I have a few of these!

https://en.m.wikipedia.org/wiki/Cat_(Unix)#Useless_use_of_cat

Two times actually! Like someone else has said, removing python wasn’t the best course of action :)

The second time was when I had a copy of the home directory of that laptop’s data on my server. The username of that laptop was the same as my server, and I no longer needed the folder containing my laptop data. Instead of doing “rm -rf ./home/username”, I somehow didn’t put a period before the directory and erased my servers home directory…

Exactly what I came here to say!