No, they are just another way to make money. I live in the greater Cleveland, OH area, and they have had them for a few years.
Back in April I got one of these tickets, $100 fine, for an incident that occured in January. The ticket was to be paid to a company (I assume the one that installed them) and they got like 60% of the ticket. If you get one of these tickets you don't get points on your license, however if an officer catches you, you get like 2 points.
This area is a low crime area. If anyone is familliar with the area by Cleveland Hopkins Airport, they could tell you it isn't a dangerous (high crime) area. It is just a way that the city can generate revinew cheaply. There is no patrol car or police officer to pay for being there.
In my opinion they are "overglorified" parking tickets that are given to a "meter maid" that sits at a desk for 8 hours a day. Now that I think about it, where can I find a job like that?