Replying to School Firewall is retarded?

My school has a firewall, and if you type in a site that is blocks, a screem comes up and tells you the site is blocked. Normal, right? But, it also tells you what is wrong with the site. You if you try to log onto facebook, it says it has been blocked because it is a social networking site. But, if you mispell google.com, like googl.com, it says CONTENT BLOCKED, ADULT CONTENT/PORNOGRAPHY. Why? it's not. It also does that if you mispell any of the school websites. I also think it tells the people who are in charge of the internet at the school what you tried to get onto. So if it does, the school thinks i'm a porn addict