A number of sites are blocked on our computers at work, we can't even get the lottery numbers since this is classed as gambling. One day I tried to look at a trade union site and got a message that it was blocked on the grounds of nudity and adult content! I tried my best not to imagine the leader of said union in the nude, but it put me right off my lunch. I should add that I've looked at that site at work before and since and, thankfully, not a hint of nudity.