I'm not the only paranoid running around!! I feel better already knowing I'm not the only one. Hah!! I've tried drilling the platters, but some of the later, more recent, ones seem to have a really hard surface to penetrate with a modest drill - and I used a 1/2 in drill table - not a hand tool.
If one bends HD platters, be aware, some fracture into many pieces suddenly like stressed glass - so heavy gloves, pliers, and full face shields.
I suspect solid state memory won't react well to high amperage 12 DC volts from a fully charged car battery or an electric wleder, or even 110/220 volt wall current - kids do not do this at home by yourself - only fully knowledgable adults with N95 respirators and heavy NON-CONDUCTIVE welding gloves consider these acts. ( That's joke for those who can't detect my sublte humor )
A sledge hammer probably will defeat most SSDs and certainly will damge their connections I would submit. Or one could cut SSDs with large metal shears - that should be pretty effective, without to much danger to the person doing the "erasing"
Not sure what prolonged exposure in an industrial microwave oven would do - I would not radiate SSDs in a microwave you are concerned about or want to eat food out of again though.
I'm pretty certain that incinerating them in a wood fire would erase them - but am a bit leary about what might be out gassed or might contaminate the burn site.
I suspect there are several folks in Silicon Valley who have contemplated these topics a bit too. They probably know a lot better, safer and more effective tricks to employ. I am all ears. 😇