I think I'd get the local Press in on this. Give them the story of how seriously concerned you are about the drunk, because there's an ancient tradition that says people who violate the sanctity of etc-etc-etc have ever increasing bad luck. "Downward spiral." "It'll all end in tears."

Of course, you have to say this with some balance of serious concern on one hand and with "of course, no one REALLY believes this but ..." on the other.

If this gets back to your drunk it could be enough to make him just a teeny bit paranoid the next time something goes wrong in his life.

sian