"Facemash" was a Hot or Not-style site. Zuckerberg used pictures of his classmates that he hacked from the school administration's dormitory ID files. The site got 22,000 page views from 450 people in the first four hours it was up.

A few days later, Harvard ordered it to be taken down, citing copyright and security concerns. Zuckerberg faced disciplinary action from Harvard but was allowed to stay at the school.