Santa if evil.
1) He is a stalker: "He knows if your sleeping, he knows if your awake."
2) Move the "n" in Santa behind the second "a", it becomes... "Satan." Coicidence? I think not.
3) He uses deer to pull his sleigh just to spite hunters.
4) He only comes one day out of the year. If he really loved us, he would bring us presents every day. Or at least once a month.
5) He is taking the focus off "Christ" in "Christmas. He makes baby Jesus cry.
Edited, thanks to Bellstrinde
6) He breaks and enters / trespasses thousands of homes a year.
7) He travels the world without a passport.
Except for those last two, I came up with all of these on my own.
Me, Myself, and I. Not to sound egotistical.