This is what I use Miiverse for. Or to draw really crappy drawings to see how many likes I can get on them. xP
I don't really see the point of wasting your 3DS battery to use it.
The worst I got is the equivalent of a tap on the wrist for accidentally posting a (very minor) spoiler for Xenoblade Chronicles X. More like an Easter Egg.
I mostly use it for screenshots anyway so I guess it's really hard to get myself in trouble.