I get why people do it--for all of the reasons mentioned above. I just don't do it and I don't post everything on my profile, either. I've seen this information tossed back at people in a malicious way--very rarely, but I've seen it. And I don't really want to set myself up for that. Most of the time, I wouldn't give a rip but every so often, I may be in a place where that would really hurt me.

I am a fairly open book in the forums, and if people want to know more, they are welcome to ask.