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Disallow: /*blackhole
Disallow: /?blackhole

User-agent: Baiduspider 
Disallow: /

User-agent: PetalBot 
Disallow: /

User-agent: YandexBot
Disallow: /

User-Agent: Slurp
Disallow: /


User-Agent: Lycos
Disallow: /


User-Agent: Seekbot
Disallow: /


User-Agent: Sistrix
Disallow: /


User-Agent: SearchmetricsBot
Disallow: /


User-Agent: BacklinkCrawler
Disallow: /


User-Agent: SEOkicks-Robot
Disallow: /


User-Agent: xovi
Disallow: /

User-Agent: semrushbot
Disallow: /

User-Agent: DotBot
Disallow: /

User-Agent: BingBot
Disallow: /

User-Agent: MJ12bot
Disallow: /

User-Agent: AppleBot
Disallow: /

User-Agent: SiteImprove
Disallow: /

User-Agent: AhrefsBot
Disallow: /

User-Agent: MoJeekBot
Disallow: /

User-Agent: barkrowler
Disallow: /