Can't anyone consider, even for a moment, the merit of such a proposal? How about posting something that has nothing to do with his weight, or words like "loon", or comments about the "left"/"communism"?
Castro has resigned, as far as I know, which makes him a former political leader and a celebrity. As one Senator said "You can walk into Hanoi right now and buy a Baskin Robbins ice cream cone... They're still a communist country. Why did we drop bombs on them?" Similarly, why did we try to assassinate Castro and now consider having him come here as a guest anathema? We haven't exported Bush, and he's done more harm to this country than Castro has.
While the Cuban Missile Crisis was bad news when it happened, and so were our attempts to assassinate him, why is it that Gorby is welcomed here with open arms but the idea of bringing Castro is met with derision? Is it because we didn't win, and don't like to be reminded that our attempt to put our personal puppet dictator into Cuba failed? If so, why are we positive about Vietnam now?