Back in the day, Dodger Dtadium in Los Angeles was used for conventions and upward of 60,000 people would attend. Daily temperatures would reach the 90's or even past 100F. There we would sit, baking, mom and kids, no money for tarp or umbrellas.
The people aound us had them though, and woe betide the person who complained when tarp rope or umbrella spokes cut across seat space, especially if that seat was occupied by a child. "You don't mind, do you?" Yes, we minded, but it was "untheocratic" to argue with a "brother" or "sister", so sunburned people sat sideways or forward in their seats, adding to their misery. The worst part was seeing many empty seats in the shade under the tarps, seats that were never shared with unfortunates or their children.
Ever try to leave your seat and make your way down a row past gigantic umbrellas, tarp poles, and ropes, then have to face the same infuriated faces upon your return?
I'm glad they're forbidden. Just call it part of the "equalizing"...