I think a way to do it would be peer pressure. It seems that
good natured celebrations are quickly getting out of control and
instead of imposing rules perhaps the way to snuff it out would be
a good bit of peer pressure. Basically if you see someone
being an idiot call him up about it, if everyone in the area gets
on your back when you do something stupid you're not going to go
doing it again. Its a way to keep the spontaneous and
unstructured form of YF while adding some control to the mob.
Next time you see someone spraying beer or throwing bottles
(hopefully never) tell them to pull their head in. And
everyone around the area needs to back up the 'telling off', that
should nip the bud in the head so long as we act now and sort it
out before the next home game.
I had previously said I didn't have a problem with beer
spraying, however I retract that statement both for the fact that
its uncomfortable for everyone affected and the fact that it is a
step towards worse hooliganism such as the bottle throwing.