Taste Of Their Own Medicine
I had worked for a family-owned computer reseller for five years when greener corporate pastures called. I gave the required two weeks’ notice and the owner of the reseller called the CEO of the company for which I was going to work and got my departure delayed by two weeks. They got everyone in the company to take me aside and tell me how big of a mistake I was making, blah blah blah, generally making my life miserable for those two weeks. When I left, I got even with them, making sure they got a taste of their own medicine. changed the entire internal networks’ passwords to “I don’t know”. When they called to ask me what the passwords were, I told them the truth.
Story credit: Reddit / niblet01