Ideology is present everywhere. It's built in to the ways we relate to each other, to our employers, to the public and private institutions and technologies we interact with all the time, and especially the way we work and conceive of work. Ideology is often tacit, baked into our assumptions even in "non-political" areas.
Squelching political discussion won't cause us all to transcend ideology, it'll just make it impossible to discuss or critique a dominant ideology whenever one shows up in someone's unstated assumptions.
This is a bad idea and a little dystopian (the world is upside down, but think happy thoughts, folks! Here's a TED talk!)
Not to mention I didn't really see a huge problem on the site, so in a time when politics and ideology are on everyone's minds for good reason, it seems you've chosen to solve a non-problem with censorship.
This is Hacker News. It's not the front page of Reddit, it's a niche site with a clear remit. I'm absolutely fine with any general political discussion being permanently flagged as off topic. If people want to discuss something like internet censorship or science funding, I think this may be an appropriate venue. Discussions about the technology of politics like econometrics, polling error or voting machine design may also be relevant. Beyond that, the internet has no shortage of places to discuss politics; many of them have a vastly higher calibre of political discourse than HN.
How about a meta-discussion concerning tactics for countering young-Earth creationism claims?