People who listen to music on their headphones too loud.

$350 for folding headphones?

We've all been around them at one point or another... Those people who are totally oblivious to the real purpose of headphones: being able to listen to music without bugging the people around you.  Sadly, most of the people you meet with this habit have (what I believe to be) a terrible choice of music.  No one wants to hear Lil' Ugly's New Hit Song "Kill all dem' Hoes and 'Mo 'Fos".  It's even worse when they have those overpriced Beats.  Why would you pay $300 for a pair of headphones that aren't worth it?  And then just wear them around your neck?  Because you got them for Christmas and you want to be the cool kid in the neighborhood!  That's why!  Now don't even get me started on people who use their iPod Touches to play music with the speaker...