Seems like some labor lawyers side with the company, citing NY law.
http://www.bizjournals.com/buffalo/blog/buffalo-law-journal/2013/11/falling-bills-fan-raises-questions-of.html?page=all
“Under the at-will doctrine, they have the right to terminate an employee for any reason as long as it’s not something protected under the law,” he said. “So if he was engaged in conduct outside of the workplace which they believed reflected negatively on them, they have every right to do that.”