Honestly it doesn't make a difference, once the cop lasers you it's done regardless of what a fancy detector picks up. Plates could work but I don't think that is the case for most of the new laser guns cops are using now a days.This is why I have a Valentine One in every vehicle I own. They have been fool proof for me and I also spray my plates with the "glare optimizer" you can find in the back pages of Motor Trend. Great stuff and helps to know when to lower the hammer.