Then you can simply opt out of FB ads controls. And enjoy the irrelevant ads.
Unless now you are like I don't even want FB to rank the news feed and show me posts from fraudulent accounts..
2. I do NOT want FB to rank the newsfeed. It should be deleted or ranked by time. The more parts of a social media product handed over to a ranking or search or algorithmic feed, the more chance they have for anti-user patterns: https://www.theguardian.com/technology/2018/may/08/social-me...
3. How would a fraudulent account show up on a feed? I'm actually curious. Do they need to be friended first?