I have an answer on SO that isn't exactly wrong. There are 3 methods for doing something. A works, but isn't what it was meant for. B is really what they should do. C works, but is probably overly complex for their application.
My answer has A and C, and some comments discussing them. The information isn't really 100% wrong, but it's not exactly right, either.
I don't mind losing a couple points to downvotes if it should be kept there for potential reference.
But I don't mind deleting it either if that's how the site is supposed to work.