Doc raised an interesting point about questions which are out of date (eg law changes for electronics on airplanes, visa rule changes) which google will still find on here.
For example This question on using an Amazon Kindle on a flight has an accepted answer from more than 2.5 years ago. Since then, as indicated in a newer answer, the laws have changed regarding Kindles, meaning the accepted answer is out of date, and the new correct answer will never be the accepted one (I'm assuming the answers are correct, btw, for the sake of this argument).
So, I see a few options, feel free to slam:
- have some sort of 'obsolete' tag. This won't help if people don't notice.
- vote to delete obsolete questions and re-ask them. Has many risks and rewards.
- delete the out of date accepted answers. Also rough.
- downvote out of date accepted answers. Also rough, but probably fairest. Owners can always delete them themselves.
- leave and hope. Do nothing.
- edit questions and accepted answers to the new correct answer. All sorts of tricky, but maybe fairer too?