First of all, let me clear that governments can detect or track anyone if they work hard because Bitcoin is not a complete Anonymous system if you make a lot of transaction from a single address and their address can be tracked. No governments have a rule that every money export or import into their country has to go through Some Tags especially in India. They do as much as they can to prevent it from the country I don't know why I need a thing that it is bad they know something which we do not know anyhow for me Bitcoin is not harmful and is much useful if we can use it incorrect way.