I'm working for the same company with one of my friends, and once I had to check his very old code. I've found a function which didn't do anything. There was a comment next to it saying "I don't know what's wrong, but it will be fixed". After I realized that this function is not really important, but it was a security hole, so I wrote "Yeah, it will be commented out!". After 4 months my manager came and asked how he can use SVN to find out who wrote this. I told him I did. He asked me not to be so personal in the future...