I've seen frustrated senior start writing this. Sometimes it's just a different state of mind that pushes us over critical thinking edge into the void.
Same. I was working on a help desk years ago helping another agent with a call where the customer was being ignorant and I sent him a message that said something like "does he want us to wipe his ass for him too?" (Not that exactly but in the context of the situation it would have been similarly insulting). Next reply I get from the other agent was "he said no".
I mean.... it's the best way to learn by being stupid and doing mistakes, but truly some mistakes are too much damage and does not help to learn or if we talk about other jobs can kill somebody.
I managed a homework help chatroom for EEs. One of them got a PI and was so happy. Another person suggested that they run that command. Later on the other person claimed they didn't expect it to work.
It took me and another mod way too long to help the other guy fix his PI. Wasn't really happy about it. The new rule I came up with was if you must must make a joke do something harmless like "touch /this" and reference MC Hammer.