First, eliminate advertising. Next, eliminate anonymity. Next, focus on teaching things that can be taught. For one example, the old (pre .com) comp.lang Usenet forums were fantastic. For another example, Consumer Reports is a blissfully dull but useful publication. B2B commerce at least comes with contracts and credible threats of legal retaliation. Broadcast consumer marketing is fully toxic.
Jawohl, mein Kommandant
Could you please stop posting unsubstantive comments to Hacker News? You've been doing it a lot and we ban that sort of account.