Sure. But those rules are enforced within the sport, not television networks. Just because tyson bit holyfield's ear doesn't mean the network got banned. Even more, just because there is a possibility that someone might bite someone's ear doesn't mean that entire networks have to be banned.
If there is a credible threat, that's a matter for the police, not the university. If instead of a website, someone mailed the threats, should the university ban the mailman, the postal system and all mail?
Also, when it comes to something as important as free speech and open access, I'd rather err on the side of more free speech rather than less.
One thing that is interesting is how so many foreigners are so supportive of limiting speech in the US. Can I ask why you are so heavily invested in supporting censorship in the US, especially since you aren't american?