I have a question about the laser detector, would it not be the case that once it's detected the laser its too late?, and secondly wouldn't the laser have to shine on the sensor? laser's by their nature an invisible unless reflecting off a surface (which is the same for any kind of electromagnetic wave, but they are directed as opposed to omni-directional like visible light)
I only ask as i got caught speeding on the motorway with a handheld device last year, and the officer lased me from quite a distance away, so slowing down once i saw his car didn't avail me at all.