What's your pet peeve? You know...the thing that irritates you to no end.?

It irritates the holy Hades out of me when people misspell words. Words like loose & lose...2 entirely different meanings. And all of the "babby" questions...why purposely misspell baby? They're, their, there. All different meanings. It makes them look illiterate. Especially since there's a great tool around called spell check. So what bugs you the most?