If I say "go fly a kite" or "f*** off", they mean the same thing. People shouldn't treat one as acceptable and the other as horrible. They are both bad.
If I say "that was a fantastic interview" or "that was a f****** great interview", neither should come with a gasp. They are both good compliments.
Another instance I can give from personal experience. My almost two year old daughter repeats EVERYTHING. Sometimes her mom(jokingly or out of malice) tells me "shut up" and "f*** you". Needless to say she says both of these.
Thing is she only knows what shut up means, not the other. So when she says shut up she gets a whooping if she's being sassy with it, and when she says f*** off I just say that's not nice to say since she isn't trying to be mean.
Now as for the last part of this, it is one of the reasons I agree with hmx on their decision. Society just isn't ready to grow up and understand the difference.