my question, better stated, would be WHAT is their criteria?  HOW do they determine?  one of my kids is an incredibly intelligent goofus.   he was born an artist and musician and does have maybe  a lick of common sense- nothing too obvious. he's not driving yet, but once he does...gets pulled over and because he says "i know you love me, it's for my own good...AND  this is going to hurt you worse than me.   once you've gone "there" (a spank on the behind) mom , you can never take it back and you're going to feel awful -  forever, mom,  but let's do this."  this from a 10 yr old...with older siblings.  can you see how i would be concerned about this son being pulled over by the cops?  he doesn't do any drugs-  both my sister's kids struggle with drug use so he is well aware of the dangers  - has  seen much first hand.  but really, the things that he says sometimes are out there.   he likes words and plays with them.  he could say anything to a cop - then what? automatic DUII?