just to temper this argument.
There are times when you need to make urgent calls, besides the 911 type things.
Are your kids/familly members sick/dying or in hospital. Are you trying to sort out a household emergency ?
Think if you were on the phone and somone jammed you.
Its all very easy for us to moan about people, but we also need to think of situations were in at the sametime.
I think indiscrimnate use of jammers is wrong, if some stupid person is just yapping non-stop about crud then fairplay
Don't also forget that by stopping people from using a phone is like somone saying you can't drive your Porsche cos there jealous.
just another view and my 2c's