Are they? Don't get me wrong, Im seriously asking here as I've always thought this too (women not being allowed in stadiums in Iran) until a few months ago I watched glimpses of an Iranian league game, can only remember Asfahan was one of the teams, and there were much to my surprise a group of ladies with the usual hijab but not burqa. And the crowd around them seemed fine with it.
They weren't kids btw, they looked, well big