Mine was more, actually strange then shocking or ethically questionable. I spent about a week helping an older, very tripped out hippie move L in Montreal. Which on face, not to weird, but in actuality the dude was totally useless at life, due to taking such ridiculous doses of L and I (a college student at the time) had to extreme babysit. When I say extreme I mean like, I'd fall asleep for an hour and he'd take like three strips or more of his L and start wandering around the city, making scenes, trying to sell L in public, ect. I'd have to use an app (early find my friends I guess? Can't recall what we were using exactly at the time) to track the fucker down and convince him to return to the hotel. I'd also have to talk anyone he had accidentally offended or fucked over out of pressing charges, beating the ever living shit out of him, and other similar situations.
The worst had to be when the cops were called because he attempted to trade L for diamonds at a local jeweler. He kept insisting that it was too good a deal for the store to pass up and he WOULD NOT take no for an answer. So they called the cops, and he began to deny it, and seeing as he had eaten all of the L and informed the police he suffered from a psychotic illness, they didn't arrest him. But I was called down to verify his story, and speak to the police. Problem was I had no idea what story he had used, as we didn't plan for this type of situation. I also didn't know if he had been caught with drugs or not, so I had to make quick calls regarding what the hell to tell the police. Thankfully I basically decided to act like I had no idea what the crazy old "friend of the family" might have done, as I was helping him live out a lifelong dream of traveling to Canada. The cops informed me that they saw his Passport and he had been to Canada not too long ago. To which I responded, with my best false anger, "That motherfucker". They allowed us to leave.
Would have been pretty normal event if it occurred in the US, but something about being in Quebec really changed it up for me, and me not at all expecting the old hippie to be such a fuck when we left. He was pretty put together when discussing the plan with me, offered very fair compensation and it sounded like a good time. I had an extreme fondness for Montreal, as I was not yet 21 and legally drinking without a fake ID was enjoyable, as was the food and remarkable graffiti. Basically the moment we crossed the border he began taking L with reckless abandon.