Such noise cameras already exist in some places. Unfortunately, in the US, we already have a problem with "ghost cars". I see plenty of cars in California with

Such noise cameras already exist in some places. Unfortunately, in the US, we already have a problem with "ghost cars". I see plenty of cars in California with no plates, fake temporary tags, plates with the retroreflective material stripped off, covers that block the view of the plate, etc. So those loud motorbikes are just going to bend their plates out of sight of the cameras.