This is obviously not the most likely scenario, but not impossible. Unfortunately, especially for newbies, there are more than a few (ahem) less than stable ladies that lurk these boards from time to time (I do have personal experience with receiving personal violent threats from a provider I never saw). The way it works is the folks who have been around just ignore and side-step the well-known land mines, while the newbie traipses merrily into the mine field.
Most likely, you're fine, and experiencing newbie paranoia as we all did. However, this is what you need to do. BTW, this isn't really that different from a normal appointment decision-making process, when your personal info is requested - which we have all had to do. The equation is all about risk (from being outted) versus risk of drama.
First, evaluate your risk if outted. Are you married or a prominent businessman, politician, etc? What do you have to lose?
Second, look at her reviews and reviewers. Do a search on your local (and the General) boards for those reviewers. Are they active posters with lots of reviews? If so, PM them and ask some polite and discrete questions. Explain what you did here, and ask for their opinion. This is what the advice for well reviewed (and current reviews) is all about for newbies. Ladies with lots of good and recent reviews from well known clients reduces the risk of undue drama (not to mention a bad initial experience).
After evaluating your risk, either book an appointment or don't. If you do, be on your best behavior (clean, on time, donation as requested and no dumb questions about "illegal acts"). The bummer is, if she is psycho, just deciding not to book could be enough for her to get POed.
Here's the tricky part. Deciding about reviewing her. You can skip it altogether if you think there could be drama which could lead to problems for you later. If all goes well, and you want to review her, it's probably OK to mention that you saw her reviews on TER and ask if she would like (or mind) for you to review her. If the session was positive, you're probably OK. If you think you need to write a less than glowing review, again, you have to evaluate the potential for drama.
I cannot stress enough that 95% of the time, everything is cool. However, as with everything iin life, there are some not nice people and there are real risks.