Vitality Stadium here, though I also go to a reasonable of away matches. (Love the Vine pub near the Hawthorns!)
It is really remarkable how often men get up to go to the loo. Each half is only 45 minutes, yet there is constant movement in the stands. My assumption is that most people have drunk several pints before the game, and the kidneys have started flushing it all out.
Would I want to share a toilet with pissed up male supporters. No, really not. I would be careful not to drink anything beforehand. And it would put me off attending away matches, where cars and supporters coaches go straight to the ground, with no chance for a loo break.