I agree with the sentiment of ignoring him. He is simply a player with potential who is way above his station, and will need to improve his attitude if he wants to get anywhere near the England squad in a different code.
I do wonder how 'big' he will think the game of rugby union is if he never makes the England squad - waiting around freezing in the harsh British winter waiting for the umpteenth goal to be kicked, in front of crowds even less than what he is currently playing in front of.