You may have already seen the major Facebook mistake circulating the Internet: A woman that was unhappy with her job decided write a negative “status update” about her boss and her job. The problem – she was Facebook friends with her boss. He ended up firing her (via Facebook’s comment section) and explained why she was a bad employee.
I think it’s pretty clear here that both parties were in the wrong. Common sense should tell you not to post negative things about your boss and your job on Facebook or any other social network, and a public response certainly doesn’t take the high road.