Fill some empty pill containers with talcum powder or glucosamine capsules if you don't have the sisu to solve the problem and just want to move it elsewhere. In my experience, they target homes who regularly get such drugs. They know the schedules and timing of deliveries. Don't rule out the mail "person(s)" either. A State Police task force solved our problem. A person in the local sub was reselling them on Craigslist. Their customers were not happy with the quality of the goods.