I'm just full of silly ideas today.
With all the talk of "don't JTG" and "don't get caught jamming" and "slow then kill jammer" followed by "I got hit by surprise and forgot to kill the jammer" gave me an idea for a device...
It would have to be wired such that it knows the vehicle's speed (say by tapping a speed signal from the ECU or from a GPS) and whether the jammer is currently jamming (by tapping a jammer's alert or mute output). Maybe also have it sensing the car's brake lights as well.
The idea is, the device would sense when the jammer is jamming and the driver drops speed, and using some kind of algorithm, would make an educated guess as to what the PSL is and kill the jammer when the car's speed drops to that level (or some small amount above that level).
For example, you're doing 80 in a 65 and get lasered. The jammer activates, and you hit the brakes to slow down. When you release the brakes, the device could assume you've slowed down enough and would automatically shut off the jammer.
If you're not going way over the PSL when getting lasered, such that you just let off on the gas, the device could make an educated guess as to when to kill the jammer. For example, it could kill the jammer after the car loses 10 mph of speed or 5 seconds of time, whichever comes sooner.
To make it smarter, it could be pre-programmed with the PSLs you most commonly encounter. For example, for my driving, I mostly encounter 30, 55, and 65 PSLs. Based on your cruising speed, the device could ascertain what speed zone you're currently in and auto-kill the jammer when you reach the closest PSL to your cruising speed.
Even better would be if it could be GPS based, so the PSLs for your commonly-traveled routes could be programmed in and the jammer killer would be completely automatic. Plus, with GPS (or other way to "know" the PSL), if you're traveling at/below PSL for whatever reason, it could disable the jammers entirely.