I gain great confidence from the principle that rational people win, on average. It is rational people that make the world, and if it gets to be something we don't want, we change it. The only real threat is rationalists with different utility functions (e.g. Quirrelmort).
(Disclaimer: please don't take this as a promotion of an "us/them" dichotomy.)
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
If continuing the discussion becomes impractical, that means you win at open threads; a celebratory top-level post on the topic is traditional.