I've never "gotten back" at a place where I have worked. I don't see the point. I agree with Gunsmoke that avarice and meanness aren't good qualities.
When I was between jobs, had two small children and couldn't take long nursing shifts I worked at a place that had an account with a restaurant, which we would feed to hospital higher ups during meetings etc. Orders would be put in and I would pick them up at the restaurant. I was treated badly because, (she admitted it) I had more education than the supervisor. I could have
put in a huge order at the restaurant, picked it up and had a party. In fact, some of my co-workers urged me to. I refused, as I felt, even though the company had treated me poorly (cancelling shifts at the last minute, constantly harping on the fact that I was a "college girl" treating me like absolute shit) I refused to compromise my own ethics just for a few minutes of "revenge."
I walked away with my dignity in tact. (I finally quit, because my shifts were constantly being cancelled) and never regretted NOT doing something wrong and possibly illegal. They were so disorganized in this department that the act probably would have gone unnoticed, but I'm not the type of person who does wrong things "because nobody is watching."