If this was a way mods would actually protest, wouldn’t it make sense to say who is saying it? They removed all attribution, all indication of votes, or any example of a subreddit actually doing it. Maybe I’m jaded from my many years on reddit, but I always get suspicious when I see a post like this that it could be a fake post or something.

With that said, if moderators actually did set their subs, like /r/aww to nsfw, that would be pretty funny.