There are some counties that has accepted Bitcoin as legal way of paying like Japan. But there are a lot more those counties that hasn't yet stated that Bitcoin is legal or illegal. As far as i heard no one is getting their salary in Bitcoins, and I mean on full time jobs. I guess that governments still doesn't have reliable way of tracking trades of Bitcoin, so that they could legalize it fully and start allowing people to pay their workers in Bitcoins. There are currency exchange places where i change my Bitcoins to my country currency, and they pay tax for their business. Which makes it totally legal. I guess till all things fell in order, Bitcoin and paying with it will stay in grey area.