in what sense does the PD apply? They are not pre-warp, pre-contact, or even native to that planet. Dougherty openly says that it's not a PD issue. Moreover, even if it WAS a PD issue, then nothing would prevent the Son'a from coming in and removing the Baku, and Picard would be in violation for interfering in a "blood feud." You can't have it both ways.