As Google bans some weapons-related youtube videos in the UK (i.e. Google, the owner of Youtube is not allowing them on Youtube, not that google is altering its search results)
The most disturbing part to me is the statement by Home Secretary (I believe this is some sort of government position in the UK, I am not positive)
"This is a real step forward. I would like to see other internet service providers follow suit to reinforce our message that violence will not be tolerated either on the internet or in the real world,"
Although of course Youtube is not an ISP in the traditional sense of the term