The fact that the author believes it is against LinkedIn&#x27;s terms of service, terms of service to which he has explicitly, voluntarily agreed makes it unethical on its face.  (Even if the terms of service don&#x27;t prohibit this behavior, the fact that he believes they probably do is important.)<p>It&#x27;s certainly <i>not</i> a grave matter in and of itself, but he doubles down by publishing a post to encourage people to join him in making a promise in bad faith.