They probably shouldn't go after anyone who's not a direct threat to Ren. But... Goro kisses him again, with a grin. "If I had a hundred yen for every cop who ever made me feel like shit."

Or made him afraid for himself, for his mother. Who saw his shabby clothes and the direction he was walking, and pulled him aside. Or who thought he was out too late, when he had to work. It's just so....

He kisses Ren again, with less bloodlust but a whole lot of anger.