'You're not welcome here'

I keep expecting to hear that after leaving comments on my friends' (tomama) blog.

My friend has a pretty wicked sense of humour - I'm pretty sure she's laughing - but some of the other comment leavers seem fairly...ummm... what's the word? serious.. intense... Along those lines, and I figure jokes about dropping kids on their heads will invariably get me in trouble one way or another...