I've noticed something of a pattern on many of our more popular questions. It looks like we're getting a lot of redundant and often lower quality answers.
It may just be my perception, but in most cases where a question gets 15 or more answers 4 or more of these answers will say effectively the same thing as the earlier answers with less or no explanation.
Some of these are of sufficiently low quality to flag for removal, but some aren't terrible answers, they're just redundant and not quite as good as the previous answers.
In a few cases I've commented pointing the answerer to the previous similar answer, but this doesn't seem to help the situation much. Often I downvote these, but without a comment explaining why I voted, it's only marginally helpful. With a comment explaining the downvote, users often get defensive. Unfortunately it seems that some users upvote these answers because often they are technically "correct," so I worry we may be sending mixed signals.
What's an appropriate way to address these answers, or should we even bother addressing them at all?