what bothers me more are people who say "of" instead of "have", like "Gaga should of promo'd DWUW"
thats because of regional dialect.. some people genuinely believe its of instead of have because of the way their accent/regional dialect makes it seem.
And just because some things sound the same, it doesn't mean they are the same. It's confusing to people trying to learn the language when the people who speak it don't use it right.