I believe the board also said Luke was consulted and he said he didn't request action to be taken and that he isn't bothered. The club has wrote to other clubs (namely Exeter) to try and get them to cut it out at their grounds but replies/actions aren't expected for obvious reasons.
Granted the chanting is sick and I'd rather they were kicked out but it's hard to control, is it fair to kick 5 York fans out but keep hundreds of Exeter fans?
Anyhow, it doesn't affect his performance and actually, during the games he gets the most stick in, he seems to turn out the best displays (e.g. Luton away). He's a professional simple as that, expects it, accepts it and shuts it out. Not once has he reacted to it as I think many of us would.