My company (a bank) has taken a fairly restricitve stance on internet usage by employees during the work day. Therefore measures such as content blocking, time limits, etc., have been put in place. I and several other friends/co-workers(99% of them pro-gun) make a lot of the decisions on what to block and why to block it. Other than blatently offensive sites(ie, porn), any site that truly detracts from the workday(gambling, chat rooms, etc.), many other sites are blocked because of the backdoor security risks they pose to the banks own network.
Unfortunately, anything that allows positng to a discussion thread, blogs, and the like fall into that category. Internet security is a real pain in the BUTT.
(BTW... DownrageTV is accessible, just not the forum.)