theodp writes: In the early days of Facebook, the company would go into what CEO Mark Zuckerberg called lockdown, where no one is supposed to leave until the task at hand is done. Speaking on Saturday at Startup School 2013, CNET reports, Mark Zuckerberg remarked that the practice persists to this day. Facebook doesn't lock people in the office, but it comes "as close to that as we can legally get," Zuckerberg said to an eruption from the crowd. The lockdown isn't the first at-home-in-a-Bangladesh-garment-factory management technique Zuck's touted at Startup School. Back in 2007, Zuckerberg drew fire for advising company founders "you should only hire young people with technical expertise" if they want to be successful. And while there are no reports of Facebook hiring 9-year-old bosses yet, the LA Times reports that only young undocumented immigrants are welcome at the hackathon hosted by Zuckerberg's FWD.us next month where "tech CEO's like Mark Zuckerberg, Reid Hoffman, Drew Houston and Andrew Mason will be sitting side-by-side with undocumented youth [with technical expertise] creating tech products to help the immigration reform movement" (invitation to 'day (and night) of working').