Usually, you would envision a real young person doing something like this, but I have seen plenty of people who are older who fit this bill. When I see things like this, it just tells me that the one playing the loud music is refusing to grow up. But, I realize that there may be some special cases where an individual may be a little hard of hearing, and have to have it up a little louder. If that's the case, then as far as I'm concerned, that would be very acceptable.
