I am beginning to feel like a tape recorder on "loop":
I stood on the Stretford End for years, on the Kop, Anfield Road End, North Bank, Kippax, Baseball Ground, Hillsborough, Bramhall Lane, Bloomfield Road, Prenton Park, Highfield Road, Southampton, Fratton Park - in fact all over, with no problems. The Stretford End was fenced in such a clever way that the crowd, although standing, could not move more than 6-8 feet in any direction and yet had complete freedom of movement. We had 3 whole coppers to police it, one each end, one in the middle - with zero problems. When the crowd surged forward on a goal, it looked big on tv but actually only a few feet were involved, the sway crossing the barrier in front, but stopping at the barrier.
We each had our own "spec", where nobody else was allowed. Everyone did, it was a piece of the SE that was ours. "Sorry mate (to a Hells Angel), thats so and so's space! He will be in in a moment!"
When I took my wife, on our wedding day, she had a space where someone had not turned up!!