Total in-joke this one: if you've played World of Warcraft, and made it to level 10, you'll have visited The Barrens, essentially a 'newbie learning zone'. The chat .. oh god. This is before the WoW obsession has really kicked in, see, when chat turns to the intricacies of Tier 2 set choices, or weapon stats, or whether Frost spec really kicks Fire spec mages' butts or not. Barrens chat is nothing of the kind: a combination of tits&ass talk, your-mum jokes, and Chuck Norris shout-outs.
At level 60, most folk have seen fit to drop the Chuck Norris shout-outs (I wonder if he knows he's a net-teen legend?). The T&A and your-mum jokes remain, of course, but by this point they're in the Looking For Group channel.
Plus ca change...
(Thx to the Terranovans for that one)