Funny story about loud pipes:
The past two weekends, I've been ferrying station vehicles in various municipal Christmas parades in my area.
At one, there was a group of 8 ditch-pump bikes in the formation in front of me. They spent the entire time before the parade started rev-tuning their bikes. ALL 8 were sporting straight pipes and were obnoxiously louder than shit.
Being in a radio station vehicle, complete with external amplified sound systems (for playing holiday music), I simply cranked the volume up to 11 to drown out the potatoes.
Just before the parade began moving, two of the the aforementioned came back to me and asked me to turn the music down...they thought it was "rude" (to be playing Christmas music in a Christmas parade) and couldn't hear their bikes!
Told them "I can't...management is concerned about safety of those IN the parade AND observers who might wish to run out in front of my van because they couldn't see or hear this
moving along the parade route....Besides..." I told them "...loud music saves lives!"
(yes, those are real speakers)
Both the captain and his first mate had looks on their faces like I'd hit them with a mackerel.
They "fought" back, revving louder and louder, 'til the town LEOs providing security asked the group to leave.
It was PRICELESS!