Frankly, I would much rather have drunks on bicycles than in cars. Neither is ideal, of course, but the thought of drunk-guided 2,000+ lb missiles shooting randomly on our roads scares the hell out of me. I would much rather take my chances with a 195 lb person on a wobbly bicycle travelling at 10 mph.
For the record, though, bicycling after drinking even a little alchohol is extremely difficult. I don't know how anybody could bicycle drunk. A recumbent tricycle would be a much better ride for drunks.