So how many people, on average (other than your spouse), drive your vehicle on a monthly basis?
If you have a family friend driving your car and they get a ticket that gets sent to you, and they refuse to pay it...then fine your point is valid. I would be willing to bet 99% of cases the vehicle owner would be able to determine who was driving their car based upon the date and timestamp. If you're lending your car out like a rental, then I guess you assume that risk.
There is no scam. The laws are clearly stated and speed limits clearly posted. Again, don't want a fine, don't speed excessively. It's really that simple.
Do you work for a speed camera company?
You missed the point. It doesn't matter if I know who was driving my car, the entity that issues the ticket doesn't.
I speed all the time and I know that if I get caught that I will get a fine and pay it. Key phrase being if I get caught. A camera accusing someone of something they may or may not have done isn't getting caught. Fortunately, I live in a state that still has a shred of common sense and the slightest idea of people's fundamental rights as US citizens.