Twitter's Cleanup Patrol

摘要

The gala on a recent Thursday evening was typical boom-time San Francisco glitz. Attendees from Google, Yahoo and Facebook traded in jeans and hoodies for cocktail attire and snacked on hanger steak and new peas inside the Beaux Arts City Hall. The convening cause, however, was rather dark: the 30th anniversary of the founding of the National Center for Missing & Exploited Children. The nonprofit worked with these tech giants to install PhotoDNA, which scans all images uploaded to their sites for child porn. This nexus of light and dark is where Del Harvey lives, and there she was working the room in a sleeveless black dress. "I haven't seen you since the suicide summit," she greeted one group of guests.