Some pet peeves:

1. Seeing their, there, and they're used interchangeably.
2. Ditto your, you're (and yore?, well maybe not)

and this one, I noticed today:

3. People who don't know the difference between "ten times more than" and "ten times as much as".

And yet when people say nuklear, it doesn't bug me at all. Go figure.

My wife suggests Christmas letters which don't include spell-check. And newscasters who refer to the police as cops, or refuse to refer to POTUS by his title.