Some cities are considering a “bounty”, where a person reporting a blocked bike lane would receive a portion of the ticket proceeds.
I’m not sure the bounty is necessary. Even having the option of submitting a photo of a vehicle blocking a bike lane, including its license plate, and knowing the owner will get a ticket might be enough to get many bicyclists to do this. (and just a reminder that most if not nearly all bicyclists are also drivers at least some of the time.)
Other ideas include providing more temporary loading and delivery zones in residential neighborhoods. To me this is not an alternative, but something that is almost a no-brainer. Poor, unimaginative and ignorant design is what creates a lot of these conflicts in the first place.
The Texas anti-abortion law allowing any private citizen to sue a doctor who provides an abortion made me think – now that we have opened this door a crack, what is to stop any state applying this approach to any law. For example, pass a law allowing any citizen to sue a driver for parking illegally or running a red light. This seems like less of a stretch than the abortion thing, because if you are in a position to take the photo, you are being put at risk by the activity and you should have a case.