I think Dean Darwin once did that, but he's not here any longer.
To answer your question, though, most of the folks here are interested in getting their trucks up and running or running better. I think the "fun" part is implied or kept to a minumin, so the folks here can get their machines back on the road.
I will commend the group, though, because it's pretty useful in that people are genuinely concerned about helping others out and lending a hand. I've seen other groups where there is trash talk from beginning to end and there was rarely a conversation that was on topic. -really discouraging.