"fentanyl and carfentanyl are starting to show up in pot."

LOL. I remember the 1980s and 90s when the government tried to convince us that the evil drug pushers were going to sell us $10 worth of pot laced with $20 worth of LCD, heroin/opium  or cocaine and then sell it to me for $10. All because they are supposedly terrible business people who want their paying customers to OD and die and pot dealers have a massive surplus of harder drugs that they just don't know what else to do with?