I think this has happened all the time, already. And not only with words. Nobody associates a swastika with peace, fertility and prosperity even though that's what it stands for, but thanks to the NSDAP abusing the symbol.... Now the word "gay" only means "cheerful", now it refers not only to homosexuality (which is neither good nor bad) but is also used to say something is bad by some people. "This game is gay", for example. I do disapprove of that, though, but still. And so we have quite a long list, I think.....