I think the most effective thing the bishops and religious superiors can do -- and I think they should do it -- is to recall the priests who work for Priests for Life, and suspend from public ministry anyone who fails to comply.  Bishop Zurek sounds a bit defensive when he makes this point:
"Priests for Life, Inc., is not a Catholic institution, but a civil organization, and it is not under the control or supervision of the Diocese of Amarillo",
but he is right.  He can't control what a civil corporation names itself -- but he does have the authority to withdraw Pavone's permission to work outside the diocese.