I've just come across an edit to an accepted answer (link here), which adds the following to the top of the accepted answer:
This answer is incorrect. Please downvote it.
As Sardaukar's comment says, Visual Studio always blindly uses the last HintPath. Alex's answer is correct (please upvote it).
This seems very wrong to me, but before I rollback the edit, I just wanted to check with the wider community the full best course of action.
I've seen the other questions (and duplicate questions) and answers on meta that cover what to do with the answer, which range from correcting the answer, to commenting and downvoting it.
I'm thinking of adding another comment to the user who answered it asking if he would delete it? He'd get a nice badge, but lose quite a bit of rep :).