User-agent: Baiduspider
Disallow: /

User-agent: dotbot
Disallow: /

User-agent: Yetibot
Disallow: /

User-agent: *
Disallow: /download/
Disallow: /database/
Disallow: /form/
Disallow: /register/
Disallow: /preview/
Disallow: /files/
Disallow: /search/similar.asp