I was just thinking, this has happened before so don't get alarmed. What if a laser jammer could be linked to either a GPS or a smart phone running a GPS app? Many stand alone GPS units and most smart phone apps "know" and display the PSL where you are driving. If the app were to allow you to program the jammer to only alert but not jam at speeds below the PSL, or better yet at speeds below the PSL +5 or PSL +10 the incidence of actual jamming could be greatly reduced and thus law enforcement's awareness of and opposition to jammers would be likewise reduced I should think. Maybe the time length of the jamming signal could even be linked to how far over the PSL you were going, less speed over the PSL would lead to a shorter jam time. Obviously, where jammers are illegal this would apply to an even greater degree.