Has the person that you're secretly crushing on become a "nudge tool" on your social media platform?  What about the person you're in a fight with?  Do they appear at the top of your news feed because they put themselves there, or because they have been put there so you will stay connected?   In other words, can you find evidence of this kind of manipulation...or others, in your "news" feed?  Is this ok with you, ethically?  Why or why not?