The best part of Halloween is not the actual merry-making, but observing the aftermath of a night of booze-soaked costumed revelry. On Nov. 1, the streets of San Francisco were strewn with cardboard scythes and axes, as if an epic battle had taken place and quickly dispersed. (And in a way, it had.) There were some who never made it home, completing their morning walk of shame dressed as slightly deflated sexy bumblebees. The guy we spotted pushing an IV and bag of fluids down the street may have been in costume, or he may have been an escapee from nearby General Hospital. And then there were those who, despite their fervent efforts, eluded the arms of another. Their disappointment is our afternoon entertainment, in the form of Craigslist Missed Connections.