That depends. If your headphones are slightly broken or your putting it on so loud someone else could hear it from 5ft away, they will damage your ears
I'm assuming you mean iPods ... if you have the volume too loud ... it just damages your ears. Im sorry if you DONT mean iPods so feel free to edit this if Im wrong
No...
I have been through scanners with my Ipods and there was no damage.
at 100Db sound can start to damage the ears.
Ipods should be protected if possible,a case will prevent scratches.
well it melted the insides of mine
scuba diving
Yes.
yes makes you mental and causes brain damage im a doctor. IT KEEPS U UP AT NIGHT
Yes a good subwoofer will damage your hearing. The better the bass the more db levels they are pounding out and that is bad for your ears.
yes ipods are bad for you because it can damage your eyes and otherthings
It can damage it, especially if you turn it on without letting it warm up a bit first.