I think part of it is also that desperate need to do something that cops seem to have in a lot of situations. With all the panic about racial abuse, violence etc at the grounds they are basically cracking down on everything and ignoring the fact that the crowds have been quite well behaved. The idea that someone would be kicked out of the ground for playing music is just stupid, and I really don't think it would have happened to anyone other than the Barmy Army.
I know a place where a royal flush
Can never beat a pair