1. Misspelling the word "yay" as "yeah." I will accept "yea" although it is somewhat arcane, but I will not accept "yeah." "Yeah" means "yes." Imagine yelling "Yes!" when you mean to yell "Yay!" Douchey, isn't it? So don't be a douche. Learn to spell.
2. Misspelling in general. Seriously, how hard is it? It's not hard. I have no desire to think you are stupid, believe me. I want to believe the best of you. But if you cannot spell, I will not be able to help myself.
3. Using the right turn lane to jump ahead of a line of cars - if you try to do this to me I will gun my turbo-charged subaru and dare you to a game of chicken. Consider yourself warned.
4. Reclining on an airplane. If you happen to sit in front of me on a plane and you're wondering why your seat won't recline, it's because my knees are in the way. If I want your head in my lap, I'll let you know.
To be continued