I was amused to see this morning that our company webmarshal was blocking Bing for porn!
You may have heard all the fuss about this but you can look at pictures and video in Bing without going to the sites themselves, which makes Bing a proxy for porn.
I have to say though that blocking a search engine because you can find porn on it may be a bit harsh! Mind you it is Bing, so are you bothered?