Wow. This has happened on every single message board I have ever encountered. We had one girl on this site I was on who was LOVED by seriously, everyone. I even "liked' her (as much as you can like someone you've never met) and she was always posting pictures, helping people out, etc. This went on for THREE YEARS, no one knew for THREE YEARS until a new member joined who was supposedly a stripper, etc (all kinds of weird junk).
Well finally the girl slipped up, and posted something her one "character" was supposed to post under the opposite character's name. WTF. Everyone was pissed, and it was creepy. Someone had devoted THREE plus years of their life faking who they were completely. Needless to say WHO THE HELL HAS THE TIME? I really don't get it. It's really, really, disturbing mostly.
I wouldn't take what was said to heart, but the recurring actions. That's just psychotic.