There are people who will run rm -rf / on a box they're in the process of decommissioning it to see what stuff breaks when. Was a bit more fun in the good ol' days when more stuff was statically linked, but it's always bound to give a few surprises, like when running it on certain UEFI systems [1].

[1] http://www.phoronix.com/scan.php?page=news_item&px=UEFI-rm-r...