While I agree with the objective - that cars/trucks should shutdown instead of idling, I have to wonder, do we really want to a society where people are paid to report their neighbors? Sure it seems like this guy is doing everything properly (documenting real cases of random idling), but what happens when people start using things like this for harassment/revenge, fabricating idling cases (similar to the Uber vomit cleanup scam), and generally making a living off getting people fined.

Compare this to a trained law enforcement officer who doesn't personally make money on every fine who will take the whole situation into account, rather than just trying to make a buck.

This make work out fine at this small scale, but we should be cautious when it comes to creating untrained citizen bounty hunters.