I met Shaine Claiborne the other day, I wouldn't usually mention it but he had an interesting quote.
Speaker-"wait, wait, so you actually let children draw on your walls?"
Shaine-"well of course! Thats what walls are for"
After which it was quiet with only a few people chuckling quietly to themselves and one young man in the audience shouting "Yes! Amen!" loud enough to be herd across the small stadium filled with about 5000 men. That was fun.