A simple idea, but maybe you could have a guy with a spotting scope or binos who checks out cars as they approach the school driveway, scanning faces and expressions. He could work from an fairly concealed position.
This could give you some lead time on somebody who looks hinky.
Obvious profile, single guy (girl) no kids in car. No need to comment, just an idea.
__________________
Descretion is the better part of WhupAss
|