I've never seen the point of not using a shotgun. We have in Britain plenty of trained clay-pigeon shooters who'd love a nice easy shot at a loaded drone. Probably wouldn't have to pay them if you let them keep the contraband. Or a tenner per 'bird' downed, whichever.
For me, though, the right thing to do would be to permit all the drugs and phones to enter freely. Someone sitting in a THC haze texting his mum isn't the bloke sharpening a shiv and/or denouncing all and sundry as kaffir unbelievers (replace with religious maniac epithet of your choice).