In truth, the odds are fairly low on a case by case basis that you'll walk into a sting.  More likely you'll be ripped off by bad service.

So, choose providers who have many good reviews on here or other reputable escort review sites and have some peace of mind.

but always check for reviews.  My rule is simple, no reviews, no visit.  To answer your questions. you don't know.  But if she has reviews somewhere, your chances of walking into a sting, getting robbed, etc., are pretty much non-existent.  Do the research, get VIP membership here and read the reviews.

There are plenty of threads on this board dealing with this subject, check some of them out.

Swim

There are no stupid questions except questions you don't ask.  That said, read the self help section by the lifesaver.  Then read back several pages on this board.  This is all FREE but required understanding for you.
Don't start at the ad sites.  There are good providers and scammers on every ad site.  Start here in TER with the most recentreviews for your are.  That leads you to their profile.  There are links to their ads, website.  Pictures.  In the profile see if she delivered as promised, real pictures.  THen read the complete reviews.  You do need VIP at this point...  but a short term of VIP could generate a bucket list if you do the other research first.  Believe me VIP costs less than one spoiled date or a scam or rip off.   I am a big proponent of it because I've been there & so has everybody else on this board.  
You want to select a "well reviewed" provider...  6-10 reviews and at least some by experienced reviewers (6-10 reviews themselves).  You should be in reasonably safe hands with a well reviewed provider.  A well reviewed provider knows her good reputation is valueable & would never willingly do anything to harm it.  
START with TER... and work in the other direction.  It wastes too muchtime & energy sifting through ads to link them up.

doesn't have any good reviews, you should move on. The constant advice for all newbies is to only see well-reviewed providers.

provider cherry in December. Have had one bad experience and it was a provider who has ads on Eros and she lied about everything. She used hot pics from a top Chicago provider and I basically told her to leave when she walked in and started verification questions. Then it turns out she had no reviews on TER because she is delisted, meaning she doesnt allow them. Suggest only seeing top 100 providers in your state, do a screen no TER and check with reviewers before you book if you have any questions about the session you read about. Good luck!