Just now I have noticed two wrong answers which have been upvoted and accepted:
I have also noticed many other wrong answers getting upvoted.
I have used many downvotes trying to affect this kind of nonsense, but I feel like I am fighting a losing battle.
This kind of thing makes me wonder about the future of this site. A site like this needs experts to decide what answers are correct, but the voting system gives power to the utterly clueless.