The FA are pathetic. A slap on the wrist would have been enough for Rio. They need to put more effort into sorting out the thugs on the pitch, rather than just saying the rules state they can't act.
I think the FA are right this idiot has a history of bad mouthing it on twitter, set's himself up as anti racist when it suits him, is a thicko and dodged a dope test. Now he's a has been player it won't be long before he drowns in a trough of his own self importance.