they probably dont care that they might have more resistance now that they are more known, cos just a 2 man team can kill like almost everyone. also im sure that theyd have vaious techniques for tracking, body finding, chakra detecting etc. to find the other jinchuuriki's

also cos the jinchuuriki's arent liked anyway they could just ask someone whos seen them, and if they resist im sure the akatsuki have no problems with torture