Then you're supporting a criminal.
Golden words.
I find it funny how people supporting criminals are looking for ways to reduce criminality rates. I never stood why we're looking for equality and fairness when the ones giving us orders are criminals themselves. The rules either apply to everyone or to nobody. What regulating BTC does is we're going to be required extra documents and our privacy will become inexistent while criminals wi still use it their own way.
In other words, what this leads to is full surveillance and control while stopping a negligible percent of the illicit activity.