A ringing cell phone in a movie theatre is sure proof that the owner of the cell phone is a self-centered jerkwad.
You anti-phone people need to calm down.
I'm not anti-phone, I'm pro-politness.
There is a scene in the Sopranos where Tony walks over to some jackass in a nice restaurant who didn't take his baseball hat off and stares at him menacingly until he removed his hat. Some people are not ready to spend time with other adults.
If control freaks are so terribly bothered by the sight of a baseball cap or the ringing of a phone they should stay where they can control their environment. The world is messy and noisy, stay home & tend to your own knitting if you can't handle it.