I think it would be a useful feature to place a button next to
link|edit|retag|flag called for example
report dead link.
After somebody clicks on it he/she could point to a dead link.
- That link would be red.
- The question/answer owner would get a notification.
This feature would have three main advantages:
- People would know that a link does not contain any useful information any more.
- More up to date questions/answers (because I hope people will refresh their content after they get the message)
- No more "hey your link is dead" comments
Maybe it would be more effective if
dead link = -2 rep
repaired dead link = +2+x rep (x for the effort)
Why can't you just downvote the question and leave a comment yourself?
In this case all people will still click on the dead link. After they read the comments and see, that somebody has reported the link, but that won't change the fact that he/she wasted time. But if the link would be red - as on Wikipedia too - he/she won't even click on it.
downvote/ close it
bad link != bad question/answer
bad link = a part of the question/answer is bad, see this