you know a guy ... who drinks, a lot you know this guy drinks while he's driving ... often you know he's had prior DWI would you try and report him? would you mind your own business? talking to an alcoholic does zero good. pretend you do nothing ... and he crosses into traffic tomorrow and kills a family. pretend you call and the cops wait for him on a side road, and he gets another DWI, loses his license, loses his job etc what would you do ?