The Quick 1: 1 Moment in Internet Censorship

Yesterday's Quick 10 looked at memorable moments in music censorship. Last night, our legendary intern Andréa Fernandes informed me of another incident of censorship closer to home:
A friend of mine always visited our site while he was bored at work over the summer. But upon returning to work during Christmas break, he discovered mental_floss had been blocked. When he asked a coworker why it had been blocked, the coworker replied, "Too many people spent too much time on that site, so the VP caught on and blocked it."
This doesn't bode well for our traffic stats. The bored at work crowd is a key demographic. Besides the obvious porn & gambling examples, are there any unexpected sites banned in your office?