[dredge]

No, it doesn't. Your linked example contains:

  User-agent: *
  Disallow: /

While the (new) digg.com/robots.txt contains:

  User-agent: *
  Disallow:

Those are very different. The former essentially disallows bots from crawling the entire site, while the latter disallows nothing - effectively allowing everything. The syntax is unusual, granted, for historical reasons.