I would imagine that drunk walking has less of a chance of killing others though. This doesn't even have to be by-standers. For example, with 4 drunk teenagers in a car, it just takes 1 drunk teen to kill 4. On the other hand, if you have 4 drunk walking teens, that kind of outcome is far less likely.
Are we comparing same levels of drunken-ness here? What about the difference between 4 drunk teens each walking alone vs. 4 drunk teens walking in a group (where it's possible to look out for one another)?
