Let's be honest with ourselves.. Have you ever blocked someone off of your SO's account without them knowing?

I have to admit, I have done this once. I blocked a girl off of my boyfriends Skype because I found an old conversation between them and they were very flirtatious and into each other. It was a year or so ago but I blocked her account and he still has no idea... Lol. I'm kind of a savage. Anyone else done this?