As has been said, working with the club and showing them that we aren't out to cause trouble, swear at stewards or upset older folk/children - will hopefully mean that for quieter games we may be able to have our own block at times.
I'd suggest everyone sings at the top of their voices, but tries to remain seated at least for some of the time. And if a steward does ask you to sit down just do it. Don't swear or go off on one. Just do it... Then stand back up when the next song starts.
It would perhaps be easier next time in a lower tier where safety isn't so much of an apparent issue.