Explanation of school blocking progun websites but not Brady and others
David Codrea has the scoop.
The school tried to blame the company making the blocking software, but the company says, no, it's a product of the school's chosen settings. The company recognizes sites that it has rated and classified by content, and sites that it has not gotten to. These are evaluated based on internet popularity -- more popular sites get first place in the priority for evaluation.
One of the categories evaluated is "politics/advocacy groups." The school chose to block these (I suppose that says something about how much they want their students exposed to the world and to diverse ideas in general). The default is to not block these. The school also chose to unblock unrated sites. The default is to block these, too much risk of malware and viruses.
Since sites are given priority for ratings based on popularity, what this amounts to is -- progun and conservative sites are very popular, and thus apt to be evaluated and tagged "policy/advocacy," while the antiguns sites are not very popular, and thus apt to be left without evaluation.