When I was on the grand jury a couple years ago, we were informed that selling ANY marijuana within (some ridiculous distance) from a school was a felony crime as opposed to being a misdemeanor if it was under some weight. Similarly, if a child was within line of sight, it was also a felony.
Most of the cases we saw involved alcohol or drugs. Get rid of those, we'd be down to half a dozen cases a month. Maybe less.