Oh! I hate linked-in. Never used it and am now "retired". Never did not work a day in my professional 39-yr work period. What do I hate about it? the resume embellishment, the spam recruiter's, and my observation (poking around without a linkedin account) of people in my work group who hated each other but were linked together on their individual linked-in accounts. If you don't like someone at work, perhaps you do not need to recommend them on social media.