I have someone threatening to write me a bad review because they tried to bully me into a BDSM session.. everyone in the review community knows that is not something I have nor have ever offered ever.

such as email(s), PM(s) or text(s)?  If this is a TER member you could report it to TER (Contact Us link at bottom of the screen) and send them his TER handle and offer to send them your evidence.  They can watch for any review of you he may submit.

...Report him. Like Steve said you have to have some written communication proof. Plus you have great longtime reviews so people will likely take your side.  

It sounds like he booked a session and provided a deposit.  Then clarified the type of session.  You told him that you don't do that session.  Then you kept his deposit and never provided a session?  Now you wonder why he is pissed?  Is that what happened or am I missing or misinterpreting something?  Did you have a session with him?

Steve gave you good advice here. Report his heinous behavior to TER and blacklist him. Extortion and blackmail have no place in this, or any, realm and you are wise and brave to stand up to it for if he gets away with it with you, he will no doubt try it on the next provider(s). Good for you for being pro-active! Good luck!

Had he posted negative (and false) information about you before you posted this, then it becomes YOUR burden to backtrack and try to clear your name. You got here first, so your next steps will be much easier if and when he does act.  Like one of  the previous responses stated, if he's already on TER, contact management DIRECTLY. Do that now (if you haven't already). If he's not on TER yet, be on the lookout for a review from him, or even a post on Discussion Boards (plural; he may use a regional one or service-specific).  Be ready to go straight to management again if he posts anything false about you anywhere.  

Did the session actually take place?

if you have email or text threads and he is a TER reviewer, report it to TER along with copies of the communications.

You don't give in to a blackmailer. That only increases the chances he will use blackmail in the future to another lady. If the facts are as Sienna states, he should be kicked off TER, be blacklisted and lose his deposit. Maybe that will make him think twice before ever doing this to someone else. Heinous behavior should never be rewarded. He needs to learn a lesson.

Everyone seems to be making a lot of assumptions here.  As I posted above, did the session even occur?  It seems as if it didn't and the guy just wants his deposit back and if he doesn't get it back then he will write one of those rip off reviews.  If the guy were on here with his side you would all probably be telling him to write the rip off review.  Too many facts are omitted here such as how much notice he gave before cancelling, her cancellation policy, and so on.

Sienna's post is as clear as mud, and she has a VERY strict deposit policy which leads me to believe that "his side of the story" might be very different.

This is probably a he says she says.

I made a post that got caught up in random moderation asking some of the very same questions.

Why would anyone send a deposit to a lady and then find out she doesn't perform bdsm after the fact? There are numerous ways for him to get that info beforehand including asking her, in a discreet manner, of course. If he really is blackmailing her, and I take her at her word unless I have convincing evidence to the contrary, I would advise her not to give a penny back.

"Why would anyone send her a deposit" PERIOD???

I also am regretting I jumped to early conclusions.  

VERY quick on the trigger to out a guy
This chick is dangerous
GREAT reason why guys should NEVER give out RLI

Then when his back is turned hit him over the head with a frying pan.

What does she mean by blackmailing?  It sounds like that means either move forward with the BDSM session, return the deposit, or if you elect to do neither then he will write a rip off review.  Not exactly how most people think about blackmail.  

and "mercenary tone" for sure.

I wrote an answer (before reading the rest of the thread) based on the assumption the meeting had take place.  I would say the opposite if the meeting had not taken place and you are talking about refunding a deposit.

Yes, including you.

Are you trying to lead the league this year? You are on quite a roll.

He went years without standing to the woke Twitter crowd, one of them must have REALLY fucked him over for him to finally realize he had a set of balls, unused balls of course, but balls none the less.

And I told her no such thing re: the police. You don't like my posts, fine, but why resort to lying about them?

Your words are still right there for all to see.

And then look at the name of the person you linked to. See any problems?

I am a lifestyle Domina & BDSM provider. Bullying is never okay, nor is switching up a session request after it has been booked. Nothing is worse, than thinking you have a GFE booked, then here comes Mr Wrong demanding caca you never discussed prior to playtime it's rude AF. BDSM sessions have to be planned & prepared for well in advance, and many providers do not offer these services.  

The problem is I am stone cold fucking sober and I obviously can't fucking read. lol

at least one person has book market the post for future use.  LOL

I’m saying that based on the information initially provided.  With more detail, there’s a possibility that the response could escalate to notifying law enforcement of this guy’s behavior, but for now, at a minimum blacklist him and report to TER.

That is a new one on me. But that's ok as he apologized and the apology is fully accepted.

and disagreeing with her approach is not anti-provider.  

You mocked her and added a stupid gif to further your anti-provider stance. And weren't you the guy who so many ladies on twitter were complaining about recently? I can now see why. Next time, if you are going to take a cheap shot at a woman and her business practices, just own it. Weaseling out the way you are trying to do now is pathetic. Don't be that guy.

You're welcome to bookmark it if you want but my comment was not suggesting you.

but I certainly knew who you were talking about, just like you weren't surprised at all that I blame "sobriety" for my fuck up. lol

I took a straight shot at her business practices, not at her personally. Moreover, you represent that I took a shot at all providers. Please explain how disagreeing with a single provider's business practices somehow represents being "against" all providers.  

I can't possibly be the only one who is LMAO at the irony here.

over a few hours and ample bourbon, as with all such stories.

I'm not only a fan of yours, MZ, I'm also a bit of a bourbon aficionado.  

I'll bring my best bottle of Pappy Van Winkle.

When things went south.  My take is that if she actually met him to do the session, and that's when the bullying started, I don't think she's obligated to give the money back, but if it went bad BEFORE the session, then I think it depends on her deposit/cancellation policy.  He might be entitled to all, part, or none of the money back.