The issue is things like this
https://www.youtube.com/watch?v=JZD-ADArwXo
If you have a classic and it is reasonable CHP will leave you alone. It is people that do things like these whistler tips that cause an overreaction. So, in order to make sure it is not targeting a certain product or people they come up with a catch all.
I pop out my tubes all the time and the CHP gives me a thumbs up.