It's not exactly a joke answer since Dr. Manhattan has the capacity to do this; problem is - there's no indication he ever did (unless Rebirth decides to prove me wrong)
Another candidate to get sorted is [translation], which is both used to ask about translations of certains works (do they exist, how was something translated), and to ask about translations of phrases in fictional languages.
@Adamant is right. Answers which are merely "bad" or wrong, but do make good-faith attempts to answer the question, shouldn't be deleted.
Please don't use this room as a way to garner enough votes to delete answers which shouldn't be deleted.
Here's one big advantage to having wrong answers downvoted but not deleted: they - and their wrongness - are visible to anyone viewing the page.
If an answer saying X (which is wrong) is right down at the bottom of the page with a negative score, then that tells anyone else viewing the question that X is wrong, which could be useful information.
This principle doesn't just hold on sites like SO or SU, but also on more recreational sites. For example, here's the lowest-voted post on Role-playing Games:
I hate to sound crass here, OP, but there's a reason that you don't date your fellow players, and you're discovering it. Love tends to make one see something in another that other people don't, just by its very nature. This means that even if you're best friends with someone, they might end up be...
The fact that the answer is there, but has such a low score, is just as useful as having a highly-voted answer saying that [content of that answer] is wrong.
@Gallifreyan In case you didn't see my comment on Mith's meta post: I think you're confused about what that "require clarification" thing means. It's about clarification from the asker, not the answerer. That canned comment is supposed to be for answers which should really have been comments, e.g. which just critique the question rather than answering it. It's not for unclear answers.