It doesnt matter if you agree or not because that is not your call to do so. Laws are the main thing government use to control his country and your job would be to bow down before the law ofcourse and ofcourse sooner or later once government start to acknowledge BTC and its threat to their economic structure then we will see a heavy tax on BTC/FIAT exchange to discourage user.
well soo the black market will act to allow users to get the bitcoins as to sell them ,currently able to get them on exchanges... if government take a huge step ,btc comunity will find a way to avoid them .... the same think some people declare the btc ammount holding others just dont....
I doubt that it will go way that far. Worst thing would be that some people will be discouraged to exchange it to FIAT and the others might still be doing it as usual. It is pretty simple to avoid it anyway because people could do a peer-2-peer exchange without involving any exchanger thus this could be use to avoid the huge tax when you are exchanging it to FIAT