StackOverflow avoids this by not being a &quot;discussion&quot;. To a first approximation, anyone can edit any question or answer to make corrections. It works because there is a [reasonably] clear set of standards and a close alignment between content and user interests...so long as those interests are not &quot;I want to talk about X&quot;.<p>It also works because of strong community moderation and a well thought out structure, e.g. bespoke software.