Idk about the rules at Burger King but McDonald's managers are either mega tightwads about sauces even though they are shipped in by the big old box, or they don't give a single shit, there is no in between.
Nobody seems to mention that these barriers are designed to slip and pull people down so they thrash down into the netting at the bottom that is designed to trap them, then they drown. The "deterrent" that they post signs warning about only on the American side, is death.
You're right not to trust this BS at all. It's straight up reefer madness propaganda. It's widely acknowledged that anything pleasurable can be addictive, that doesn't mean we need to ban gambling or alcohol or weed.
I think with the slime jeans stuff just kinda sticks to 'em