In the US, there are ways to get around speed cameras and such that are dubious but legal dodges such as:
The vehicle is registered to a company, corporation, etc.
The vehicle is not registered to the driver
The vehicle is registered to multiple persons.
While there are a few--very few--states that cite the owner, the vast majority have to cite the driver. In all of the above, if the person cited that was on the registration as owner, wasn't that person, they can simply show proof they weren't the driver at the time the ticket was issued.
Now, the issuing authority will ask that you identify the driver, but you are under no legal obligation to do so whatsoever. That's on the issuing authority to do and they don't have the time and resources to go hunt down who was actually driving.
Also, some states require both a front and back license plate while others only require a rear one. For example, California is the former, while Arizona, next door, only requires a rear plate. California speed cameras etc., are set up to only photograph the front of the vehicle getting both the plate and driver in the shot. If you don't have a front plate (legally) the state of California can't cite you because of that lack.
All of that is totally legal if a bit dubious.