I agree about the quality of discussion on HN - although you should also find the communities at AskCulinary and AskHistorians quite troll-free - AskHistorians

I agree about the quality of discussion on HN - although you should also find the communities at AskCulinary and AskHistorians quite troll-free - AskHistorians in particular has a very strict policy on rigorous answers that can be fact-checked.