I have asked reviewers that question.  I'm a distance from the action and some providers won't give a general location. I've asked for a "general" location not an address. DT, SLP, Bloomington are big areas but enough to tell me if it's doable for me or not.  
Some areas I just flat out won't go so I don't have to waste a providers time.  
I have reviews on EM but not TER simply because I see providers that are already reviewed. Much appreciated by the way. I don't have the luxury of TOFTT since I need to make every trip count if you know what I mean.

So yes, being on the asking side I've had reviewers provide me a general loc but would never ask for any specifics and hope they would never give out specifics. We also exchanged pm's for some I've seen but they haven't.  

I have sent pm's for info and have not written reviews.  It is difficult getting in to see reputable providers without references or giving up too much personal info.  I don't write reviews if they are not willing to be a reference and some are not acceptable references.  Any help from a journeyman hobbyist is greatly appreciated.

I recently have had several, several also inquiring about a specific Provider and always the same question of what did fa cost. I’m declining any such request if not from someone who hasn’t posted any reviews. Seems very suspect.

I'd be reluctant to give info to someone who has not written any reviews too.  No telling why they are asking.  And I think you should do a review even if the provider you've seen has already been reviewed.  Times and services change.  Noticing a few of us who have been writing reviews for years are slowing down.  It's nice to be able to ask questions of reviewers to narrow your options and maybe save some of your time and provider's time when an old guy does finally get the chance to get out!  

One of the things reviewers do is help out fellow reviewers and also show a willingness to contribute.  The same can be said of participating on the boards.  I'd probably answer general questions but not anything too specific, particularly if it is information available in reviews.

I think the biggest thing is that it depends on what the person is asking. I have pmed a few guys asking questions like prices, rating a certain skill, etc. Some reply and some don't(although I have a few reviews). Ultimately it's up to you but if it's a more innocent question, I would answer. Of course if they are asking too much info, or specific location details, I would ignore them.

If an unknown guy pms me I check to see who they have seen. I will answer there question if they have reviewed a lady I am interested in and I will ask about them. Be willing to give something to get something.