Sadly stupid people are part of the human equation, and the more humans there are the greater the probability for mass stupidity exists. But you cannot live worrying about others, you will drive yourself into insanity or depression or a combination thereof.
Besides, there's this really nifty factor called "Natural Selection" that works incredibly well, just really slowly.
So buck up lil camper and avoid movie theaters, swimming pools and urgent care clinics.
Why in the name of anything would you want to avoid a swimming pool in the summer?