One is owned by the government. Another is owned by a private company that extorts motorists. These fines never reach the DMV unless you refuse to pay.
They are usually on the roadside in large metal boxes as opposed to being mounted on above the light signals.
Accidents happen all the time. Work trucks hit pot holes and paint splashes onto those cameras blocking the lens and flash.
Debris falls of trees knocking the cameras down.
Tea falls out of ships on rough seas in Boston Harbor. All kinds of accidents can happen.
Be safe out there.
The way some of these cameras work is they demand the fine and threaten to pass it to the DMV if you refuse. Most people are cowards and or broke so they pay.
Americans need to grow a pair or balls, and brain and start dealing with these problems instead of crying about it on the internet and consuming goyslop.