If we win we can't loose this weekend

My favorite is when someone writes "he should of done this" instead of "he should have done this". Should of? :dunno:

OMG, I think I love you, Saint Rob. I have tried explaining this to MANY people and they don't get it. For the life of me, I don't know how in the world this ever got started but it's a raging epidemic almost as bad as it's/its. Never mind, I know how it started, people write like they talk.

Did Martin Grammar-tica hijack this thread?