What I hate is when all the traffic is doing 75, and they cherry pick someone out and give them a ticket.
There are drivers who are truly a danger and need to get tickets. Weaving in and out, tailgating like crazy, etc. If what they are doing is an attempt to ticket the people who deserve it most (rather than someone driving fast but safely), then I don't mind what they're trying to accomplish. If you are going to give 100 tickets, you might as well give them to the 100 biggest assholes.
Their way of achieving it seems a bit odd though.
Also, they may be on the hunt for people with radar detectors. If they see you speeding in the distance, the guy might pull you over and give you a ticket regardless of what the gun said.