Are you sure you're not Magz? That sounds like a question he'd ask just to get everyone riled up.
First off, wise up. Do you really think every loud bike out there is a Harley? Come on now! There's plenty of Japanese Harley-look-alikes these days and their riders like to put on loud pipes as well because they too like the obnoxious noise they make. Do you really think Cobra or Vance & Hines would go broke if Harley riders stopped buying their aftermarket pipes? Certainly not because most of their business is for other brands of bikes and other types, like sportbikes.
Speaking of sportbikes, have you ever listended to the noise they make? Or those stupid little Japanese cars with the fart can exhaust? Or the homie-wanna-be's who think they need to make everyone in a 10 block radius aware of their lousy taste in music.
If your question was in jest, good job. If not, open your eyes, grow up and wise up.