I noticed that over the past few days, the community has gotten a lot more aggressive about downvoting poor challenge questions. I think this is what needs to happen and will eventually lead to a site full of high-quality puzzles, which is what it looks like we as a community have decided we want. Thank you for doing so!
Specifically, what I've noticed is that on the homepage right now, almost all questions are either highly upvoted or heavily downvoted. The downvoted questions are the kinds of assumption puzzles and poorly-constructed puzzles we don't want anymore, while the upvoted questions really are high quality.
This post is meant as a thank you, feel free to discuss if you think this is a positive step in the right direction or not