Your proposed solution involves blanket censorship based on your personal opinions about the nature of a piece of the Internet. There isn't much else to discuss.
http://news.ycombinator.com/item?id=499044
edit: my team's last startup was an anonymous social network, ala 4chan + Facebook, so please understand that my current position was formed even after spending years of my life in the chans.
Here's the original, but again the links are broke: http://news.ycombinator.com/item?id=707294