I used to worry about this, on other sites mostly, but then I kind of realized I didn't really care. If someone thought of me differently if they were to read more personal posts, then it's their loss and not mine; they don't deserve to be in my life.

But I can understand your concern, and I think as long as you keep your information limited (such as your state, location, name, email, etc) then you should be fine. Someone would really have to do a lot of searching to find you on such a large site.