If you're stupid and rich enough to pay someone to smear food on your face, please call me. I have a fridge full of food and I could use some extra cash.
LOL, no I've never been there, but I remember reading (YEARS ago) that in Communist Russia there was no toilet paper (or, at least, most people couldn't afford it). [Insert Yakov Smirnoff joke here]
I think that's poor sportsmanship, even if it's not technically against the rules, and its teaching those kids a terrible lesson: it's OK to deceive people to get what you want, as long as you don't technically break any rules. Shame on the coach.
On the one hand, I think the bus drive overreacted. On the other hand, there's nothing wrong with teaching a kid that it's not appropriate to intentionally fart loudly, and that the proper thing to do is try to let it out slowly and quietly. Nothing wrong with teaching kids basic manners.