The first time this happened: "The company engages in regular “random acts of kindness”: workers form a noisy conga line and single out one of their colleagues for praise. The praisee then has to wear a silly hat for a week." I would make it very clear it shouldn't happen again. If it did, I'd leave the company.
Does anyone else see the irony implicit in "regular random acts of kindness"?
Or better yet, abandon the entire idea and get a rock climbing wall instead. I love those things.