I had one other thought about this entire discussion, which of course came to me while I was driving.
Decades ago, when I got my driver license and had to take driver ed, study up for the test etc, I sort of remember a "trick" question regarding how fast one should drive in a given situation.
I don't think any of our LEOs have weighed in here but I figure they must be at least looking at this convo.
The old dictum is that you drive "as fast as is safe" or something like that. It was on the written test and seems to underlie the Vehicle Code, which makes sense, because its the basis of even having a Vehicle Code going back to the days that cars were first invented then introduced.
The simple fact is that both tailgating and brake checking are simply not safe. They are disruptive driving behaviors with the potential to cause collisions. I am not saying we are supposed to drive as though on barbituates, but it seems like remembering the basic principle is relevant.