We have a few unmarked cars that don't look anything like cruisers; for instance, A red Camaro, or a black Dodge.
The state of Maine spends tens of thousands of dollars to put up warning signs such as, SPEED LIMIT 35, so, if you get grabbed for doing 50, whos fault is it?
The cop doesn't get a dime of that fine either. I have no sympathy for anyone who thinks the law doesn't apply to them. At 60 mph you are going 88 feet per SECOND. It takes a full second to even see a problem, and depending on your age, another half a second to react, and another 240 feet to stop. That's why we have speed limits.