User-agent: Twiceler
Disallow: /

User-agent: BecomeJPBot
Disallow: /

User-agent: Baiduspider
Disallow: /

User-agent: msnbot
Disallow: /vistalinks/
Disallow: /tandem/

User-agent: googlebot
crawl-delay: 15
## google N/A, yahoo by min, and others by sec ?