Oh, I should add: "practise discussing things in public, without losing my cool" is also a reason I self-post links to forums like HN.

Not uncommonly, people are salty in the comments. Mostly it's fun to ignore the salt, and let the community do its thing, while also trying to observe what's going on with my feelings. Sometimes it's fun, or necessary, to show up and respond to flip the thread from destructive to constructive. This is a skill I can get better at, and I feel my odds of being better are higher with topics I've thought about for a good long while, and so that balances out in favour of taking the risk to self-share.