This is the kind of thing that gets entirely the wrong kinds of people interested in your chat room hijinks. I can imagine a healthy combination of Federal and State law enforcement being involved here, and I can envision the perp walks that remove kids from the homes of their parents. In many cases, though, this could involve sociopaths who subsist on stolen credit card scams and bilking schemes, things like that.
It's wonderful to be smart about the Internet. It's another thing to suspect that the incompetent Feds won't find you. They will, if they're serious about doing so.