I think this is a bad idea, even as an experiment. Treating groups of ideas as off-limits, immutable or in need of protection from other groups does more harm than good. Your analogy of "politics [being] war by other means" is exactly why we should foster political discussion just as any other intellectual pursuit. Arbitrary isolation between the political or religious self and our intellectual self is, I believe, why politics is so violent and difficult to talk about. You don't need homogeneity for a good discussion and you shouldn't assume chaos when heterogenous people start talking.
We talk about important things here and should do so in a way that is conducive to engaging conversation. Topics shouldn't be off the table.
Also, what is 'political'?
Edit: typo