A solution that could help (at least me) would be to mark nodes after a certain time has passed, e.g. after 3 months.
Then nodes could be marked as "be careful" if they have a negative reputation and with "outstanding" if they have a very high
positive reputation (e.g. > $norm * 4).
I assume the crowd-effect would be low, as these nodes are no longer very visible (they are mostly found using search-engines).
And for nodes found that way a general inidication of the quality would be helpful, as the reader might not see/check the whole context of the node.
Just an idea ... Rata