I've read some ilustratives questions about why questions should be protected and why "not" they should be protected, and after all of that I should say that at very least: protect EOL questions, from getting new answers, is the most ideal solution for what I'm about to explain.
This answer motivated this question (which I found in Late Answers queue). As you can see, the answer itself is bad (although it could just work), don't give proper explanation and is better as comment. Reading more the complete set of answers some of them are practically saying the same thing with different words (in last link, you have to think hard to see the relationship) or nothing but a link; also, one point out to a bug report, that could have closed the question eons ago (unless the bug = offtopic was established later). Is also important to notice that only 2 out 8 answers have upvotes (and both says the same) and 1/8 with down votes, but as if that isn't enough: 3 of them answered this very same year.
By my very own rationalization, I shouldn't be reviewing this answers in the review queue... and they just counted as 1 review that I could have done with a late answer that actually adds something new and clever to a old problem (or that maybe, the question, is not a problem anymore since it changed behavior, I don't know); so, I would like to propose that this question, and why not, others with similar situation, be protected.
On a side note: there isn't any protected related tag (and system don't help me out), so I just leave the discussion tag.