Long 4pm / Burnt Crossiant

Everyday I hear and see racists, bigots, homophobes and others (I'm not naming every type of fuckwit I'll be here forever). Most justify their own actions under "The Old School" and think that's fine. How are you meant to combat such logic or is it just a waste of time arguing. Is changing a mature or just brainwashed young individuals opinion worth the effort or even realistic?