While there are some questions on Bitcoin.SE that have objective answers, a lot of our questions are more subjective than that. In the early days of this SE they were met with close votes, yet, I do believe that there is a lot of constructive and informative expertise between pure fact and pure opinion.
However, these questions often attract a host of abysmal answers, e.g. statements of differing opinion, one-line answers without explanation and link-only answers.
I would like to propose the creation of a post-notice that could be applied to such questions by moderators with the following content:
This question does not have only one correct answer, it is subjective/argumentative: Constructive and informative answers focus on explaining "Why?" and "How?", and back up any opinions with arguments, facts, or references.
Give long answers rather than short ones: Opinion by itself is noise and will be deleted.
What do you think: Is this a useful endeavor? Is there a better way of conveying the message than through a post notice? Do you have any ideas how to improve the proposed text of the post notice?
Examples where I think this post notice might be appropriate: