Another Funny Thing About School Internet

Websites spreading hate-filled propaganda and pro-republican sentiment like foxnews.com and glennbeck.com go unblocked on the internet for Spotsylvania County. But when it comes to respectable news organizations like the Huffington Post, it's blocked. Why is that? Is it because the Huffington Post tries to spread sensibility to a public that is caught up in a world of hysteria and paranoia agrivated by the propagandists at Fox News?