That'd be cool, but i think by the time it detected the laser and you reacted to slow down, you're already busted. You *might* be able to avoid one if they're using radar though, IMO.
Plus, i dont know about there, but in SD area, the majority of tickets are by cruisers pacing you, or by air... at least thats what i hear from my ticket happy friends. Nifty, but a waste of $. My :twocents