We do not have the jurisprudence for that, so in principle if a single federal judge establish that you will be banned via your bank blocking your account. If this happens, for sure the Supreme Court will chime in and establish an common understanding and the lower/higher chambers will legislate around it.

Despite of what happen in Brazil politically this is a very serious process that if a judge misjudge that it could open a huge precedent for a lawsuit against the state.

In practice you can't. Nobody required banks to implement this, they certainly didn't go out of their way to build it.

You can still have your bank account blocked by a judge.