It is annoying. They do it because they are low class (not talking about how much money you have) and they have a vocabulary of about 20 words. And some do it because they think it makes them sound tough
Ya also alot of people do it when they first start using swear words and they don't know how to use them properly yet and its like they can't stop because it's so new. I'v noticed alot of 6th grader do that.
Hmmm, I don't think I'd get on my high horse if the only argument I p[resent is to generalize, and invent reasons / characterizations about people.