This is perhaps the most annoying backpack ever. That might not sound like much, as there aren't many backpacks out there that anyone would classify as annoying, but just take my word for it. The Skullcandy LINK has built-in speakers, allowing you to hook up either a portable music player or your cell phone and share those sounds with everyone around you.
Man, those Nextel walkie talkies are annoying enough; can you imagine someone having a phone conversation that's being blasted out of their backpack? Combine that with the ability to just walk around blasting your crappy taste in music and you've got, again, the most annoying backpack ever. Now you see.