"If your radar detector goes off indicating laser, that mean the cop's already got you and your speed."
Not true. The laser beam, like radar, expands with distance. The difference is the rate at which it expands -- the angle of the beam. It is quite possible to pick up the signal before the officer can detect your speed. I have, in fact, picked up the laser signal a couple of times where I knew beyond a shadow of a doubt that the officer had no idea what my speed was. You don't have to believe it. It's still true. Laser detectors can and do work.