I think naughty actions being free without a cooldown is important. It shows what people are like when they're free to fully indulge in their naughty impulses. The same for nice actions not being free, if it didn't cost anything, it would lack almost all meaning. We've learned so much about so many people because of this event, people revealing their inner nature and stuff.
Like, could I be throwing snowballs and stealing presents? Of course I could, it's free, it's easy, there's no penalty for doing it. But I don't because I would derive no enjoyment from it.
Could I be saving my TBT rather than spending it on hot cocoa and presents that will all be undone by naughty people soon anyway? Of course I could. But I enjoy helping people, so I'm happy to spend my bells on that. I'm getting more enjoyment out of spending them this way than hoarding them.
And, as always, whenever I post here, I'll brace myself for a pummeling with snowballs. XD