I was a cluster consultant in a room full of 6100s and music students would power the machines off, losing their work, all the time trying to eject floppies.
I don't recall if it was a DOS model, but the only 6100s in my high school's labs had their outer button plastic caps removed, possibly for that reason. I highly doubt it was vandalism—many other Macs in our school and none of them were so much as markered upon.