its all cool. guy i met has a small setup in his basement, also in a school zone. the neighbors called the cops because they could smell it. the detective came and my friend showed his garden and paperwork and probably card too. i dont know the exact words but the cop basically said ok you got your paperwork we're good to go. he also mentioned about being in a school zone and how its kind of a gray area but said they're not concerned about it. also the guy is a regular joe, doesnt get in trouble, doesnt sell to kids, that type of thing.
also the school zone thing is a federal law. i dont think its anything to do with legal grows. i think its one of those things, where if feds bust you, they slap on that extra school zone violation charge. fbi even seen my state legal grow which was in a school zone, from an unrelated crime not involving me or my patient. they we're cool and actually gave my garden some compliments. i actually feel like im living in a free country. btw i dont charge my patients for stuff i grow, only stuff i get from other caregivers.
so in conclusion if you have a small legal grow, you shouldnt worry. no guarantees though. dispensary, co-op, or something big time, i wouldnt push it in that case. be safe and happy growing to all!