Mac, I know what ya mean.

The school system I used to work with did a "massive block" on many sites and I could access many of my sites.

I build models(mainly star trek...go figure) I could access one site, but not the big sci-fi model site.

A fellow teacher one day could access her gardening site, then next...no.
However, every crack-head gang-bang rapper site could be accessed...yet Rob Zombie couldn't.

You'll just have to spend more time on the comp. at home!!!