While this is one approach, I think it's only a partial solution. Stack Overflow has a huge user base and many users who were once active are now either occasio

While this is one approach, I think it's only a partial solution. Stack Overflow has a huge user base and many users who were once active are now either occasional visitors or have moved on completely. I think something akin to a stale vote would work, because trying to organically out-vote an answer that has gathered hundreds of votes over the years but is now out of date doesn't really work. Another alternative is Stack Overflow's "community owned" answers, but those bring another layer of politics into play.