We have simply discussed the surveillance scandal enough. There's just nothing more we can say or do that will matter right now. When Americans here go vote in November, maybe they will remember. Maybe they won't. Either way, the horse is long since deceased and partially liquefied.
My suggestion may sound silly at first, but I think it serves a real need. We, as in Paul Graham, the moderators, and the community consensus, have twice now (first SOPA, then spying) decided that such-and-such political issue is important enough to the technical community that it deserves to be discussed and mentioned. When that happens, the the moderators can slightly change the board style to indicate that discussions relevant to the present crisis are acceptable -- maybe a black border and lettering on the Y symbol at the top-left. When the controversy ends, the board style changes back, and just this second signal is the important one: it means that we are done, it is over, if you want to keep discussing politics do it somewhere else.
I, like you, appreciate the possibility of a board devoted entirely to technical content, but the reality is that sometimes it may just not be feasible, here, Slashdot, or anywhere else. It is far better to have a system in place to keep such discussions under control than to pretend they won't happen at all. Because they have, more than once, and they will again. Occasional, specific discussions of events involving the tech community may be important simply because, in small amounts, they facilitate cohesion among the members by drawing our attention to things that may affect us as a whole. But the important part is occasional and specific.
Any community devoted to research and development, like HN, faces the challenge of living in the present while building the future. Our priority should always be the latter, even though we are part of the present world, and occasionally we find the present needs us. But the future needs us more.
The opposite is true.
For too long the minimal to zero reporting these issues have received in the majority of news outlets was met with an abundance of silence and indifference. Outside of a few communities on the net (and fewer offline), there hasn't been discussion on these issues. The Guardian finally breaks one story that manages to have legs for a week or two in the mainstream press and we're done here?
No. Just no.
>I, like you, appreciate the possibility of a board devoted entirely to technical content...
This has never been the case for HN, nor was it ever an ideal for HN:
http://ycombinator.com/newsguidelines.html
From the first line of the first question about submission guidelines: On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups.
While most (read: not all) political posts are discouraged, the discussions around surveillance have been more technical here than anywhere, and it would be hard to conceive of a discussion with a political element being more on-topic and imperative than the discussions of late.
I feel that you've highlighted a possible underlying cause of HN's present malaise, which is: many community members here are poorly connected on the Internet. HN is an open website, which means that it is very easy for someone who is new to the Internet to find and browse. If you've been commenting a lot in the recent political threads, I can make the following predictions: you've participated in online fora for less than ten years, and you don't pursue social connections much deeper than reddit user flair.
If you would like to take part in a lot of technical and political discussions regarding surveillance, you should consider joining a newsgroup or mailing list (if there still are any, I know politech and cypherpunks are dead) specifically devoted to this discussion. Usenet requires a modicum of effort (and maybe a subscription fee) to participate, which can help to limit the discussion to serious contribution by serious participants. You may also want to subscribe to and comment on blogs by people who know about these things, so you can get to know people and contribute to a discussion that, in order to be any good, must stretch on far longer than a single comment thread. There are communities devoted to this sort of discussion.
The content-link plus tree-style-comments format of HN is good for day-long free-form discussion on lighthearted issues of interest to technical people. It is not suited for deep, long-term discussion of complex political issues. HN can't be usefully political even if it wants to be, any more than HN can be used to design novel methods of quantum error correction. Some things just aren't suited for the HN style of discussion.