I'm not aware of any. Maybe I'll start one.
Another favorite of mine is: looking at the right file, but on the wrong host (for example when connected via ssh over a fast network, you simply forget that you're in a remote shell).
Another favorite of mine is: looking at the right file, but on the wrong host (for example when connected via ssh over a fast network, you simply forget that you're in a remote shell).
Now, shutdown and rm are the worst to add to the mix.
Hint: it was only once.
I've heard of people doing things like having a terminal background colour escape sequence in their login scripts as well, so it's immediately obvious if you're on a production host.
[1] http://manpages.ubuntu.com/manpages/natty/man8/molly-guard.8...