Personally, I think those questions need to be treated more like our homebrew-review questions. Just asking "Does this break anything" is a zero effort post. They are wanting to construct homebrew/house-rule, but haven't done any effort to see if there are issues - and no work has been shown.
We should hold these to the same standard and ask folks to come up with their homebrew/house-rule, evaluate it, show us the work and ask for feedback on areas they recognize may be problematic.
Just asking "is this broken" isn't really enough. I mean, I guess it is with just a downvote, but then this becomes a 'homebrew it for me' type exercise. I think it's better to close it and howshow them what needs to be done.
For those here who are looking for "what needs to be done", please see this meta question on How to Ask a Good Homebrew Review Question.