Yeah, in guild groups I usually have a pretty good time. One time towards the beginning of the expansion there were four of us and a goblin dk or warrior, the mage from our guild kept hitting on him and saying very sexual things, until finally the goblin asked "Are you a girl irl?" I responded with "He's not, but I am. =x" Thankfully he took it in good stride. I did feel kind of bad for him, even though it was really funny.
And just last night me and one of my guildies who is from Australia were in a troll dungeon, and she emoted something naughty while have a cat non-combat pet out, about stroking it.
The other people in the group liked that of course, so I egged it on with saying "And sometimes I help her!" So then of course they wanted to know if we were both girls, which we affirmed. Followed by "Do you know each other irl?" I laughed and replied "No, we do this over vent!" Her comment was "Yeah, we've got webcams set up and everything!" It was hilarious.