The stewards do a very good job of pretending that group behind them in the corner is not there.

So the stewards can not distinguish between football fans and rugby league fans? And they feel the muppets in the East Stand's behaviour is acceptable so they turn their backs on them?
Bizarre.
And yes all clubs have some of these idiots, but your club seems to actively encourage it by allowing it to continue game in and game out, season after season.

I had to laugh at a steward who came up to have a word with someone a few rows below me for having their legs over the seat in front, fair enough perhaps but meanwhile the monkeys in the corner are swinging their shirts in the air and waving their fists! Hmmm

Yes indeed, and make sure you don't stand up for too long, or block the aisles.

He will, we spoke to the Hull FC Ground Safety Officer this morning and he is taking this very very seriously. I'll also pass any comments you want onto him Bully.