Re: If I could have a dollar for every time…
Around 1990ish, I had to extract a few[1] camera filters from my computer's 3.5" drive. I kept it on a desk in the downstairs back room, and my camera gear was under the desk. The actual floppy discs were locked in a holder, and I came home from work to discover that a sibbling's younglings had tried to use the computer - and presumably tried the filters because it was about the right size, and they couldn't get at the actual discs.
[1] These were very thin bits of plastic that sat in front of the lens in a holder, rather than screw on ones.