You still have to use your instincts & common sense. Lately I've seen them primarily driving in unmarked cars & pacing people with their radar off. I watched a trooper nail somebody using this method twice in as many months & as recently as yesterday I was cruising at 80mph when a car with more antennas than I would consider "normal" infront of me caught my attention. I dropped back down to 70mph & rolled up on his left side & waved to the nice trooper who waved back. Your eyes are your best radar detector. Pay attention.