Definition of Legal Tender "coins or banknotes that must be accepted if offered in payment of a debt."
By this definition Bitcoin is not legal tender anywhere in the world and probably won't be for a long time to come. This is just governments posturing and making themselves seen to be warning their citizens about Bitcoin, while they figure out what the hell it is

It's also another way to implement the legal realities of BTC at a government level.
That said, the article shouldn't scare anyone off anyways.