Jesus, guys, the Fred/Michael Phelps comments are clearly jokes. No-one would genuinely be that stupid.
Although, in fairness, it is a relatively hacky/overdone joke. That's one of the problems with twitter really, hundreds of people make the same joke without bothering to check if anyone else has. I think I've seen at least 50,000 variations on "more like dead phelps, amirite?" so far.