That didn't stop a tester on a team I managed. Server was getting low on space, I found a bunch of crap in a sub-directory named tmp. Deleted said crap. Tester complains shortly after, I explain what happened and why one shouldn't put stuff in directories named "tmp". He retorted that those were production tests. Okay, maybe one can't be expected to remember 30 or more years of Unix naming conventions, but I should challenge you to battle simply for using crappy, non-descriptive directory names. I'm supposed to find production tests in a directory named "tmp"? Clean out your desk.

Of course there was no backup, because the sysadmin doesn't back up things in tmp directories.