Already today you don’t have to have a SIM card to make emergency calls.

Why not take it all the way and provide emergency phones that does one and one thing only – call an emergency number.

It can be cheaper, more sturdy and have better battery life since it isn’t used much (if at all) and doesn’t have that many buttons, screens, in/outputs and whatnot.

Kids are famous for rising the audio to 11 just for fun.

I am not writing about youngsters and rock but toddlers and kids listening to walkman/mp3-player/whatnot that for a shorter or longer time raises the audio volume to hearing damaging levels.

Why not create headphones that are limited in themselves. Electronics it them limit the amount of energy allowed to push through. Since the mechanics of the ear phones are known it shouldn’t be too difficult.