It's enforcing the law it's preventing tangible harm from occurring. There are people that disliked seatbelts and their restrictions at first too.

Taken to its ultimate conclusion we’ll end up living in pods like Wall-E. God forbid people experience danger or risk in any aspect of their lives.

"Turn off the radio when someone is unbuckled" is not an excessive or unusual precaution. Don't be so dramatic and hysterical.

It's very unusual!

Deactivating the radio does not prevent harm. Rather, it’s a penalty. But, if you enjoy being punished by an inanimate object, knock yourself out. For all I know, you find it erotic to be bossed around by ‘your’ vehicle. Whatever gets you off. More power to you. I’m sure there is a market for folks who would enjoy having electric nipple clamps shock them when they forget to use their turn signal. To each their own.

What tangible harm did turning off the radio prevent in OP's case?

I'm not passing judgement on the radio turning off, I'm just saying: calling out leaving a dog unrestrained as "pretty reckless" isn't that off base.

Some people will browbeat you over topics that they personally don't care that much about, just so they can feel good about themselves: I agree with that. But I think people tend to really do feel pretty strongly about the unrestrained dog thing.

At the end of the day it's your life, your dog, we all take risks, etc. etc. but it's still an uneasy thing to think about how it can go wrong