Text Messaging while driving.
Personally, I get nervous when I'm in the car with someone and they're texting while driving. It's one of the reasons why I prefer to be the one driving places when I'm with a group of people.
I wouldn't ban Pitbull ownership because they're not inherently bad dogs... people just don't know how to train them. I wouldn't ban pick-up trucks because they're useful trucks. I wouldn't ban banks because I don't have a personal vault where I can stash my personal funds... little though it may be.