Job etiquette rule no. 1: don't give out your jobs' secrets.
Someone needed to tell this to former Microsoft employee Alex Kibkalo. After getting a bad performance review, ol' Alex here thought it would be a good idea to leak Windows 8 code coupled with software for combating piracy to a French blogger in 2012.
He was arrested for stealing trade secrets this week after Microsoft investigators discovered a chat between Alex and the French blogger, where the blogger let him know what he was doing would be considered very illegal. Bad boy Alex simply replied, "I know :)."
The blogger forwarded the code to another Microsoft employee to verify its authenticity, and that employee contacted an executive and triggered the investigation.