My parents number is pretty close to the UW admin number, parent's is 235-#### and college's is 233-####. So one day I answer and it is guy asking about the classes he signed up for, but the guy happens to be someone I know. He had a problem with reg for classes and wanted to make sure everything was ok, so I played along. Made some noise with my keyboard made him wait alittle bit, asked for his information to confirm and then told him everything was good. I then ran into him awhile later and asked how classes were going, he started to bitch about how the college f'ed up his stuff, I just went with it.
To this day I have never told him.