We don't normally recommend getting your friends blackout drunk, but in this instance, it is for their own good. People who drive drunk tend to be compensating for something: There's some empowering feeling they get by breaking the rules, however stupid their rule breaking may be. These are also the sort of people that will go shot for shot with you when challenged. It might mean that you'll have a nasty headache in the morning, but when you're on your tenth shot of Jim Beam, remember that are you doing it for your friend and your community, if you can remember anything by that point.