Maybe this idea has been raised before, but does anyone want to discuss what would happen if a concerted effort was made to regularly throw traces of drugs (finely ground up marijuana for example) into as many postboxes as possible? If enough was thrown in, perhaps even the mail handling equipment would become sufficiently contaminated that it would rub off onto mail all throughout sorting stations and trucks. Has anyone tried this before just to fuck with the system?
Of course the scope would be limited but if drug dogs doubled, tripled or quadrupled their false positive alert rate, that's a crapload more work for mail and customs staff that are already overstretched.
Drug dogs don't actually have any effectiveness. They're a visual deterrent and probable cause vending machines. Don't act like you're doing something you shouldn't and you'll be fine.