"First of all, I would expect the manager of England to know the rules and know that it is illegal to do that, because the player is under contract, " said Moyes.

BBC: SPORT | Football | My Club | Everton | Moyes realistic over Rooney

All the usual rules about copyright and libel still exist online (indeed, I know two bloggers who have been sued for libel in the English courts although that was a rather vexatious case rather than they really had libelled someone) and yes, all the usual stuff about incitement to violence, racial insult and so on still applies.

FORBES: Shocking News: Illegal Things Are Illegal Even on Facebook