Irritating grammatical errors - what's your pet peeve and why?

It bothers me that many people do not know the proper use of there, their and they're. The same is true with your and you're. I also cannot stand when people fail to use commas or use them at the wrong spot in the sentence, completely confusing the meaning of the sentence. For example, "A woman, without her, man is nothing." Or did that person actually mean, "A woman without her man, is nothing." It could really get ugly if you failed to use it in the sentence, "I am helping my uncle, Jack, off the horse." If you failed to use the commas and to capitalize his name, it would look like this, "I am helping my uncle jack off the horse." Uh, okay!

Well, I hate slop, or spacing type words such as starting a sentence with, "OK, like I was with this guy...." Or confusion of word meaning misuse like, "Rather then go there" which should be, "Rather than." Or confusing effect with affect, where effect is the consequence of something and affect means to influence. Or "May I use that?" means you have permission and "Can I that ?" means asking for permission. My greatest peeve, however, are those people who refuse to learn how to spell. I could go on and write a book about this topic.

Mine would be something like.. "I ain't done nothing wrong." Hillbilly talk and people using swear words every other word. I also hate when people don't know the proper use of to, too and two. But I say "funner" all the time at work just to make my co-worker mad... ;)

Mine are:

1. 'Your' instead of You're.

2. Apostrophe and 's' for plurals, e.g. apple's

Aargh!

i hate when people say pet peeve.

My pet peeve is

BAD SPELLING...................