The Germans and Austrians go that extra mile to impress on their children the importance of being nice. If they're naughty, they might get something more than a mere lump of coal in their stocking. They might get something much, more worse.
Krampasnacht is a Germanic tradition, celebrated with festivals and parades, such as this one here, in Graz from a few years back.
H/T Quim from Blogging Isn't Cool