I have recently noticed some answers that were plain out wrong to a subject matter expert, yet they were NOT downvoted.
While review queue allows some chance of dealing with them, I see that sometimes they slip through (especially older ones).
As such, I'd like to propose our own homegrown review queue for "completely wrong" answers - namely, this question.
The rules are as follows:
If you see an answer that you know is wrong on the main site, post a new answer to this question. Your post should contain:
Link to the wrong answer
Detailed explanation (with unambiguous proof from canon/authoritative source) of why the answer is wrong.
If you see a mention of an answer that is listed as wrong here, but you think that is in error, comment on the meta post about that answer, by adding a rebuttal (again, showing proof).
Examples of way wrong answers (I post them here since they already got downvoted so don't need to be queued below):
"would of had to of made the horcrux before he was nearly destroyed killing Harry" is 100% wrong since JKR stated in the interview that Nagini was created as a Horcrux AFTER V was nearly destroyed - namely in Harry's 3rd or 4th year.