Something you should never do

Go behind your company’s firewall to look at porn. Know a guy that did that at two big corporate ag companies. Then proceeded to have to register as a sex offender. Wife divorced him and took there two young kids with her. Sad situation.
We had a guy at work in the late 90's building a pron website on one of the spare servers.
 
Spit on an electric fence.
Actually, nothing bad happens when you spit on one. However, if you piss on one like my brother did when he was around 10 yrs old and we were out hunting with our dad, well that's a whole different story.