Just as a POC, I set up an old Radio Shack bulk tape eraser next to a drive (don't worry - it was in SMART pre-fail already) to see what'd happen. Just turning it on for a split second made the drive completely stop being able to access anything.
Data Hoarder
We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
It took me longer than I care to admit to figure out what being a person of color has to do with it.
Play them Janet Jackson.
Miss Jackson, if you're nasty.
Potentially relevant https://xkcd.com/538/.
In UK, and I expect other parts of the world, it is illegal to refuse to hand over encryption keys when compelled to do so by a court and the result is a jail sentence.
So what happens if the suspect just goes "uhm I forgot". There's not really a way to prove if he forgot, or is refusing to tell.
No password to gain if you stored it on paper. Get creative for your poor man's switch. If you are already recycling paper without a care for longevity, the acid will quickly plump the indentation from your writing pressure and diplace ink and "graphite." Great for the enviornment and ridding you of your pharmacy papers. Not so great for your sanity because it becomes a hobby.