California AB1824 (exhaust system)

And then there’s the reality of the situation - most police officers don’t carry decibel meters. If you get a noise violation, it’s because you were being a complete jackass. Most of the cops I know have Harley’s; they’ve got muscle cars, they’ve got giant 4wd trucks with performance exhausts. They’re not going create a giant paperwork headache for themselves unless they’re positive you’re over 95 dB’s, which means if you get that ticket it’s because you’re WAY over. And even then, you probably got pulled over for something else and failed the “attitude test” on top of that. So, don’t be a jackass, don’t run open pipes, and you won’t get that ticket.

Exactly right ! Unfortunately, Kalifornia is far from a no-jackass zone. The Harley beards have been getting away with open exhaust waaay too long IMO. The Mustakes seem to be pretty loud too. There's a chucklehead down the street from me that has a '18 Silverado that's louder than my Dart with a 1/3 of the motor in it. Just blatant.
It's fun see a new breed of car guys getting involved, but they're not as careful as us old folk were at their age. The envelope has been pushed, and that's all the excuse the cali lib's need to rain on our parade.