The connection you aren't making is that politics leads to flame wars, on the internet. "Politics" regards deeply held beliefs people hold about how the world ought to be run. Also, the same discussions tend to be run over and over on ad infinitum. Hacker news doesn't need it. It does well by having a tight focus.
Your point is well taken. But tech discussions can also lead to flame wars and HN seems to handle those rather well. I for one am interested in what this community thinks about many subjects. Including politics.
The guideline I'm referring to here is not stupid.
The "don't comment about flagging" guideline is. It's meant to eliminate pointless arguments about what is or isn't germane to the site, much like how you're asked not to comment about being downvoted. But flags are invisible, and the number of people flagging is dwarfed by the number of people upvoting threads about Ron Paul's newsletters, so that the only way for it to leave the front page of the site (precipitously, if you didn't notice) is admin intervention.
Commenting on this post in the first place was stupid, since the story already got buried. I just felt bad for 'davidw, and I'm a nerd, so when someone says "I think HN is in fact a great place to talk about politics", it's hard for me to resist commenting that it's by charter not a place to talk about politics.
I'm answering in detail because you seem to follow my comments, and I don't want you to think I'm blowing you off. I'm not. I don't know you or have any problem with you personally.