Things like that don't happen worldwide in sudden, There are laws and regulations in most of the advanced world and I guess BTC is still far from forming a threat that such movement come in place... I guess the community will still use it even if it is banned.
Well they will still use it because you can use bitcoin only in the internet so anytime you can deal in your house without going to outside.
For me if it is banned i can be still to use bitcoin since i am always online.. in my house..
The other matters if bitcoin waa ban is bitcoins are anonymous online coin. So wgen you use it or use make a transaction with bitcoin , no one knows mate.
I think ban bitcoin without strong reason is impossible to do even though government try to do it.