Duh! I would think that would be a standard good idea. But first I have to ask the question, why are bags even allowed in movie theaters? Why would a person even NEED a bag?
In my day we were not allowed to bring bags into theaters. We would never even consider bringing a bag ANYWHERE unless we were going camping or to school. This thing about taking a backpack everywhere you go is a perplexing fad. First, what could you possibly have to carry all the time? All you need is a few pockets which contain your wallet, keys and phone. Anything else is unnecessary.
Women, a different story but still mind boggling. Travel light people! It’s far better. Keep it simple. Keep life simple.