Enforcement should focus on the speed outliers, less on the posted limit itself. If the speed limit is 65mph, but all traffic is moving at 75mph, then I'm going to drive at 75mph. The most dangerous drivers I've seen are those going 30mph or more faster or slower than the rest of traffic. Yes, the problem is that then makes enforcement subjective and that itself can lead to abuses. But it's a sensible approach in the short term.

Because of my morning routine, I often end up getting on the highway around the same time as this other driver who merges into highway traffic at 35mph, and several times they've nearly caused a crash. They're as much a menace as the idiots weaving in and out of traffic at 100mph+.

In many cases the state and local police are always speeding here as well, going the same speed as everyone else (regularly 15-20mph over the limit). Fortunately I do often see them pulling over the aforementioned idiots going 100mph+. Though I wish they'd at least give warnings to the people going dangerously slow as well.