https://www.cnbc.com/2018/05/24/the-united-auto-workers-just-filed-a-labor-complaint-against-tesla.html > The United Auto Workers say Tesla CEO Elon Musk allegedly broke national labor laws by tweeting. > A complaint dated Wednesday and filed with the National Labor Relations Board says Musk violated the National Labor Relations Act when he sent out a tweet the union alleges threatened to take away stock options from any employees attempting to unionize.