Has this ever happened to you? No, it hasn't, and if it had and you were offended, I'd have to use one or more homophobic slurs to describe what I think of that.
Look I'm not saying the left isn't overreacting to language and that there's never a place to use the n-word, but you don't tweet it... you yell it out a passenger side window, or during sex, or if you're having a particularly tasty sandwich.