The longhair community I'm on does this, too. I think some of the members have spotted each other and found each other through their board as well. I think it's pretty common to do, especially if you're into something and join an online community. The people at the other board are always talking about how others think they're weird for being "too into something"... obviously it's not too weird since it's an incredibly active board (a lot more active members than this place, I believe).