Note to self: in Georgia, speed with impunity on overcast days. Otherwise, watch out.
Here in Hagersville, they do enforce some things by aircraft. I know a guy who only buys contraband smokes (from the reservation close by, where there is no tax) on cloudy days because a local Dutchman was caught buying tax free smokes by a patrolling aircraft, had his stash confiscated, and was fined, I believe, $475 to boot.