I know it's just an offhand comment, but it's really annoying given that Batman actually doesn't go out and beat up junkies. He's got a history of being pretty compassionate towards people in those kinds of situations.
Also it implies that Batman just beats up everyone he meets who's committing a crime when again, if he can just catch the person who just committed some crime he does that. The versions of Batman where he's wanting to wash the streets clean of all scum is the later creation of specific writers, but not inherent in his character himself. In fact, he's far more likely to go after higher-ups in the drug organization.
The idea that Batman beats up people who can't pay their rent is becoming an annoying meme that people seem to actually seem to think has some real truth to it just because it's cynical.
And also a bit ironic given that later GM's all Yeah, my Damian's awesome because he bugs people so much! Because he looks down on everyone and is really violent and likes to hurt people--but he's clearly a hero because he's Batman's only son.