Well, it is used a lot in the media, and like anything else, has become part of the general vernacular. Beyond that, it conveys informality and for some people, probably imitates their natural speech. I wouldn't be surprised to hear that in conversation. Anyway, trying to stop the evolution of a language is like trying to dam a river with your finger. The manner in which we speak has changed vastly throughout history, and will continue to do so as long as people are talking. Don't like it? Don't worry, probably won't be around for that long either way. Words are tools, but they can also be toys. What's wrong with having a bit of fun with them?