Most of those crowds (bar the concerts) would've been before the days where there was less concern for spectator safety (noting they once got 65k into Footy Park for a Grand Final where people were sitting on the boundary line and on the time clock).
And before the days people didn't feel they needed a nice chair to sit on to watch the footy, never seemed to bother anyone back then.
People smoked, drank and did as please and had a great time. Of course I am sure there would of been incidents just as there still is today but it didn't bother anyone and most were happy as.