Simply stated, the guy is rude.  In all walks of life, and in all businesses, we (unfortunately) encounter rude people, and must deal with it individually.
If she wants to be aggressive, tell her to call him out on this board and explain his behavior.  Of course, she probably won't do that.  She already gave him the free 1/2 hour, right?
Other than that, I recommend doing what I do when I encounter rudeness:  Ignore and move on, and don't associate with that person.
Of course, there may be another side to this story, if someone would like to tell it.  But, I'm not into "Discussion Board Pissing Contests," either, so I'd probably just drop it.
What's the song?
"Why Can't We Be Friends," right?
And, Mya, a little P.S.: Your new talent looks hot!  JP

Unacceptable! Doesn't everyone have emergent situations that arise and which need attention? It seems fairly clear that this person had a responsibility for her child and she was addressing it. Not only did she show the respect to inform him, BUT offerred to make arrangements to attend to his desire (needs?) And he then threatening her to boot to the point she had to buy the bribe. So now he provides for the rest paranoia and distrust. Mya is correct that the climate is too tough, it seems, for this behavior.
Repurcussions for the (so-called) "hobbyist"?

Jeffrey's right, the client was rude to threaten her. No gentleman would have acted that way when given the courtesy of a cancelation call three hours before the appointment.

He is entitled to give his side and has the right to post a bad review but, if he explains it the way that you did, I don't think the gentlemen of the board will pay much attention to it.

There is absolutely no reason to become threating especialy when it comes to "knowing were the incall is" this type of person should not be seen by anyone if he is capable of escalating in this fashion. Not to mention his willingness to threatin based on knowing the location. All for a 1/2 hour session. He is a cheap ass with an attitude. That type of behavior is dangerous to us all and should not be taken litely.
Let me qualify by saying I have nothing against 1/2 sessions but if that's all your planning and you don't get your way what the heck else is going to set you off.
My two cents
Luckly most of us have a little respect and remember our humanity.

Hi Mya,

I think it’s awful that she had to endure the stress of providing services under threat during a family emergency.  Too have to line up and pay a sitter while not getting paid herself adds insult to injury.  If the guiding light is the golden rule of treating others the way you wish to be treated then this jerk was operating in the dark.  

I think her problem with him may have started when she offered an hour appointment instead of the half-hour as originally agreed.  It may have appeared to him that there was no emergency at all, and that she was attempting to manipulate him for more money.  Of course, this may not have been the case at all, but it could have been his perception.  

It does seem unfair that the guy has the option of posting a negative review of her, without real recourse on her part to contest it.  Did he threaten to post her incall address in the review?  If so, she should be made aware that TER reviews can’t be posted until the moderator has had a chance to review it.  I’m very sure that the moderator would not allow the address of her incall location to be posted.  Perhaps if she realizes this, then she won’t allow herself to be threatened in the same manner in the future.

But was telling her he knew about her location an implied threat of physical harm? Then in my opinion other ladies should be informed who he is so that they can avoid any contact with him.  

I sincerely hope that things went well with the family emergency and that this has not too negatively colored her perceptions of clients in general.

The restraint of the people who responded  is a credit to them and their polite and respectful natures.  I'm not sure a person who threatens a provider  deserves that much respect.  That kind of  stunt is the mark of real shithead!  (sorry)
Half hour appointment?  What is that ? Do you also  get a shooter of a fine Merlot?
Reminds us of what the ladies  sometimes have to contend with. Folks  should not  have to fear those kind of threats.    Hopefuly  the  information on the client involved will be shared amongst the ladies. I have had appointments cancelled by some wonderful people that I have gone back  and will go back to see.  Gentlemen  will understand that unexpected things come up and schedules will change.

Mia I feel for you because the same thing happened to me for the most part. I missed an appointment due to a booking error and was not informed of the booking. The client then instead of rescheduling or accepting any form of appology decided to vent his anger at me in a post, and posted my incall location along with my picture with his views to my horror. I ended up cancelling the rest of my tour and relocate. This cost me dearly. Finally the moderators took this info down after it had been viewed about 300 times. The client then PMed me saying it was his intention to drive me out of business. Hobbiest need to know that this type of behavior will do nothing but hurt the business and make it more harder on all of us. This should never be tollerated and these people need to be blacklisted as hobbiest

what is "a major local provider"? If it means what i think your impling Why would a "Major" offer 1/2 hour sessions?
This lady should expose this man for what he is, but then again we have not heard his side. From experiance I find most ladys lie or stretch the TRUTH a bit

Apparently 'this man' (and the term man is used loosely since his behavior demonstrates a lack of maturity) is only able to bully with threats otherwise, I would think that he would have stepped up and done it by now. If he can threaten to write a bad review I would think that he knows where to post too.... ahhh, but then others would be able to respond and he would have to act intelligent and discuss it with them! LOL

That is just plain uncalled for.  That person obviously has no class what so ever.  He should be black balled from seeing any decent provider.  No provider, or any person for that matter should have to put up with being treated like that.  I don't know how well connected she is with the other local providers, but I would suggest she get the word out to others about this creep.  Just my 2 cents.

You know the odds are pretty good that the man in question might not be privy to the internet boards. My guess is he is new to the hobby. Sounds like some anger management problems. Whatever the story as to what occured threats should never be tolerated and bring maturity into serous question. Attempting to win by intimidation is arhaic and doesn't belong in modern society.
Besides he would realize that all the girls on the boards have back channeled by now and the boy is blackballed already by my best guess.

You stated:

"The provider never had a session with guy.  So if he posted a bad review it would be false."

Not if he posted "Tried to book a 1/2 hour session as she advertises, and she tried to force me to shell out for an hour" That is a bad review and correct in his warped mind.

I am not defending the jerk, you should never threaten anyone.