There's precedent for this, or rather for people figuring out a way around it. A NYC law that paid rewards to those to report idling vehicles. A few people make non-trivial sums doing this. They act like tourists or like they're lost in a phone conversation so they can hang out around the vehicle and record the violation. They have to record the truck idling for a few minutes to collect the money, so without a disguise they risk being beat up.

https://www.nytimes.com/2022/03/19/nyregion/clean-air-idle-c...