I agree, when I wasn't having a beer or eating pulled my mask up. I had worked at Home Depot as cashier when this started. Our CEO gave all of us over 65 emergency time off.I took 3 months until they put the plastic up and required masks.I say this as one of the few who was wearing a mask last Sat, good luck enforcing that or getting people to recognize the difference
I still put my mask on anytime I go into a store, limited protection to me.
You can't expect the ushers to try to enforce those rules.