I'm 39, and I know of at least a dozen other people IRL around my age who play. I know there are a lot of mature players out there, but the more I play the more I have to wonder just how many of these idiots I run into are just children <insert young age here>. I think a lot of parents just decided that an internet connection and $15 a month is much cheaper than hireing a babysitter to watch thier children for several hours a day.

EDIT: Oh yeah, I know plenty of people my age who act like idiots as well.