This is a good thread. A few more things to be careful about:
- Posting favorite movies, music, etc -- Make sure they don't match between your real life and your secret life. It is very easy to search for profiles where the person loves Rain Man, The Sound of Music, watches Glee, and adores the Grateful Dead.
- Fudging your birthday has already been mentioned. For people who are into Astrology, you can pick another date within your true sign. But, note that some websites protect your birthday, but post you astrological sign publicly.
- As a model (any type), searching a site with eye color, hair color, rough age, and a few other features will often pull out a small list of people to look through. So, if you have adult modeling profile(s) and commercial or artistic modelling profiles, it can be quite simple to find one from the other. Quite a number of cam models, are listed on ModelMayhem or similar sites. And, from there, you can often get valid contact information.
- that is what came into my head this evening after reading these posts ...
As said before, no reason to be paranoid, but don't be ignorant either.