"Bike-shedding" is a phenomenon where there is excessive discussion of a topic because it seems easy, so everyone feels that they are competent to discuss it. We seem to have a couple of recent examples:
In example 1, there is a good, reasonable question (I upvoted), and a couple of highly upvoted answers that state opposite points of view -- followed by another 20 answers.
In example 2, a question is asked that duplicates a previous question. There are currently 2 close votes, 6 answers, and 22 upvotes for an answer that IMO is very poor and would have been ignored if posted now as an answer to the original question. Buried among these answers to the duplicate question, but with only a few upvotes, is a nice answer from an expert in the field (author of a popularization on the subject) which contradicts the 22-times-upvoted answer and which would have been a nice answer to the original question.
Is there anything we can do to reduce this kind of thing? It's a very negative thing for people visiting the site if they have to sort through all of this to try to find a reliable answer.
The only thing that occurs to me right now as a solution would be that possibly activity on duplicate questions could be kept from spinning out of control if votes to close were somehow more prominently displayed -- but this would I guess require a change to the SE software.
We also have the mechanism where people with a lot of rep can single-handedly close a question as a duplicate. But this is not used much, both because people with this power exercise self-restraint and because it's highly tag-specific (e.g., I have the power for general-relativity, but not for special-relativity).