1. I got a cellphone just a few months ago. I always keep it on silence mode.
2. At work, too often I have to remind people that the library that our cellphone policy is that you talk in the front or back lobby.
3. More than people that let their phone ring, I cannot stand people that use hands-free headsets. You see them standing there talking to "no one", and everytime, EVERYTIME, I think they are full-blown, out-of-their-skull nuts.
4. I wish the US would legalize cellphone jammers. I'd have one instaled in my car.