I don't know if this only works with the computers at my school, but you can put "https://site" instead of the usual "http://site". That gets past the school block on our computers. And no, I don't dis at school.
I'm on right now! I'm in the lab for one of my classes right now and the DIS isn't blocked. But this is the first time I've come on during school. I'm surprised the server didn't block it. But after I posted this I realized that people's signatures don't come up; so I'm guessing that most pictures are blocked.