When you dine next to little ones and are served any meat dish, jump back from the table and say "WHAT??! This is REINDEER meat!! How COULD you?? Santa won't be able to deliver presents now!"
Explain to kids that something terrible has happened to Santa, it's the same thing that happened to Grandpa before he died, he's gone crazy and he's not wearing his Santa suit anymore, and he's mad and yelling all the time, and there's something REALLY wrong with all the elves, they've turned evil and mean and they're fighting with everybody, it's just really, really bad. Then show them footage of Saruman and the orcs from Lord of the Rings.