I just found this question: How to remove the thumbnail frame in Nautilus? posted almost a year ago. Then noticed OP has posted an identical question at U&L which got an answer with a positive score. The question is technically on-topic at both sites IMO, but I believe it's against SE policy.
What is the right course of action here? I used to think flagging for moderator's attention is the right way to deal with these questions, but my last such flag was declined.