I suppose you have that thing where you ban a protest and it still happens, it's not a good idea to steam into everyone or trying to arrest everyone. I remember a Walsall away game where they tried to arrest the whole away end for singing a derogatory song about the referee and masturbation. Those were the days. They stopped the game, arrayed in full riot gear on the other side of the pitch and then charged us. There were a few minutes of full on fighting until they dispersed again, seemingly being ordered off by someone. In short it doesn't usually help to attack a crowd. They will respond. Just the way psychology is.
The match was probably 88 or so. We had Ian Wright.