While I agree the courts very, very often overstep their legitimate powers (as do the other two branches of government), no court in this nation can initiate any action against a civilian.
That means that even if everyone on SCOTUS hated my guts and wanted me thrown under a jail for no reason whatsoever, they have no power to send people with guns to my house. The executive has to do that. Since this is such an awesome power and is prone to abuse, we have checks and balances, namely a trial.