Yes well I've been over there and things are not clear cut as people who haven't lived there may think. Normally there is always a way to stay but you might have to pay an agent to arrange a visa for you. I have heard the VN government is starting to crack down on people without legit visas including people teaching illegally which is quite common there. They've always been quite lenient about people doing visa runs and so on but yes often times the smallest crackdown can put the masses into a panic. I reckon loads of people have little more to do than get worked up over social media posts :)