My Son's Navy Recruiter said they have seen a VERY sharp rise of people with significant hearing loss. I like to crank my music from time to time but these days, there are too many headphone / phone Zombies out there.
My biggest gripe with loud music are the jack asses with the $$$$$$$$$$ system in their car and feel the need to roll DOWN their windows. That MIGHT impress a 13 year old.