Kids don't wear them properly anyway. They're touching the outside and inside which you're not supposed to do, they don't wear a new one every day, they don't wear them over their noses, the list goes on...
Then you've got the kids who share drinks with each other, spit chewing gum out on the floor and mix outside their bubbles as soon as they leave the gates.
Masks are a red herring, imo and a bloody time consuming one at that.