@Betwrong. Agreed, ethically the government should not label any address as bad without proof, however, we cannot trust them to act ethically all of the time. They can assume or imply that your coins are dirty, declare it in public and tell exchanges to deny you.
In transparent blockchains, we can be considered guilty until we can prove our innocence by ourselves.
In a V for Vendetta kind of state, we could. But, fortunately, there are few states like that left on Earth(with Belarus trying to stop being like that right now, but that's another topic). I really believe that in the world we are living, people are getting more and more freedoms, including financial ones, with time and not the vise versa. Governments have to provide a really strong case for seizing someone's money.