Well, if you consider the fact that the question is CW, and there are 161 answers... that's about 5 and a half days worth of "free" downvotes you can use to try and knock the question's delete barrier a few notches. With 11 people, you can get 330 points off in the first day alone, plus whoever else rallies to your cause but doesn't have sufficient reputation to cast a delete vote - their downvotes are practically a delete vote by reducing the requirement.
It'll take a lot of people and a lot more time than usual, but it's still be fewer than 146 people voting to close. If the question is damaging, and the answers are what is keeping it alive, then it is all the more reason to use every resource you have available to this end. Downvotes mean "This is not useful", which is exactly what can be applied to that question and its answers.
Even if the downvotes weren't free, I'd still think that if something is harmful, then it'd be worth the cost to get rid of it.
RESPONSE TO COMMENT
The entire reason that the new delete rules were created was to prevent the deletion of questions where one or more answers were valuable. When the question is closed, the value of these answers is indicated by the number of upvotes, which tell the system "This answer is useful". Votes were basically given an additional meaning (as if they didn't have enough already...).
Consequently, downvotes tell the system "This answer is not useful", indicating that it isn't worth presence on the site. Naturally, only downvote answers that truly aren't useful. Treat this the same as you would any other closed question that has good and bad answers - downvote the ones that don't serve the community if it means helping the community.
Yes, people can counter your downvotes. But that is the public speaking against your idea that "These questions don't belong". They're saying, with the new meaning of upvotes, "These questions do belong". This makes the presence of votes in both directions a proper use of the system.
If you believe enough in a cause, fight for it with all of your might. That is all I'm saying. If you are worried about opposition, then why fight in the first place?