You might need a cell phone for this delicate maneuver (NOTE: only for black belts and higher):

Stand outside some bar some Friday night in the summer when there's drunks coming out (better go in a group);

When they fumble around to get their keys, FIRST, ask'm if they'd like for you to drive. Fair enough? Totally fair. Most, if not all, will flat-out refuse, saying a string of caustic vitriol, poifectly kosher for those in that state;

SECOND, if they're really drunk, offer to help them get their keys in the lock. They cannot decline. Fair enough? Totally fair. Then, when you have their keys, hide'm and call the coppers; if they try to ruff-you-up, lay'm to waste... but dont kill'm. That's a sin. Might have to call a paramedic to deal withe overkill.

DRUNKEN PEOPLE usually don't have too much sense anyway if they wanna be in that state in the first place; you're doing them a flavor by making them think while they're in jail. Actually, you should be proud, not haughty, by wiping-up the gutters from their killing kind - and the coppers will definitely respect you. You pro'bly saved a life or several by your heroism.

I never had a loved one die by a drunk, but they were sure speeding like they were. At least they didn't hitNrun. That's honorable, Mark. You'll get rewarded when you perish. I know. God doesn't make trash.