Robotların ismi belliyse (yani robotlar ismini her seferinde değiştirmiyorsa) robots.txt engeller. Referans olması açısından kendi robots.txt dosyamı veriyorum, aralarında Teleport gibi tüm siteyi indirme programları ve mail toplama programları da var.

#Banned Robots
User-agent: psbot
Disallow: /
User-Agent: Googlebot-Image
Disallow: /
User-agent: CherryPicker
Disallow: /
User-agent: EmailCollector
Disallow: /
User-agent: EmailSiphon
Disallow: /
User-agent: WebBandit
Disallow: /
User-agent: EmailWolf
Disallow: /
User-agent: ExtractorPro
Disallow: /
User-agent: CopyRightCheck
Disallow: /
User-agent: Crescent
Disallow: /
User-agent: NICErsPRO
Disallow: /
User-agent: SiteSnagger
Disallow: /
User-agent: ProWebWalker
Disallow: /
User-agent: CheeseBot
Disallow: /
User-agent: ia_archiver
Disallow: /
User-agent: ia_archiver/1.6
Disallow: /
User-agent: Alexibot
Disallow: /
User-agent: Teleport
Disallow: /
User-agent: TeleportPro
Disallow: /
User-agent: MIIxpc
Disallow: /
User-agent: Telesoft
Disallow: /
User-agent: Website Quester
Disallow: /
User-agent: WebZip
Disallow: /
User-agent: moget/2.1
Disallow: /
User-agent: WebZip/4.0
Disallow: /
User-agent: WebStripper
Disallow: /
User-agent: WebSauger
Disallow: /
User-agent: WebCopier
Disallow: /
User-agent: NetAnts
Disallow: /
User-agent: Mister PiX
Disallow: /
User-agent: WebAuto
Disallow: /
User-agent: TheNomad
Disallow: /
User-agent: WWW-Collector-E
Disallow: /
User-agent: RMA
Disallow: /
User-agent: libWeb/clsHTTP
Disallow: /
User-agent: asterias
Disallow: /
User-agent: httplib
Disallow: /
User-agent: turingos
Disallow: /
User-agent: spanner
Disallow: /
User-agent: InfoNaviRobot
Disallow: /
User-agent: Harvest/1.5
Disallow: /
User-agent: ExtractorPro
Disallow: /
User-agent: Bullseye/1.0
Disallow: /
User-agent: Mozilla/4.0 (compatible; BullsEye; Windows 95)
Disallow: /
User-agent: Crescent Internet ToolPak HTTP OLE Control v.1.0
Disallow: /
User-agent: CherryPickerSE/1.0
Disallow: /
User-agent: CherryPickerElite/1.0
Disallow: /
User-agent: WebBandit/3.50
Disallow: /
User-agent: NICErsPRO
Disallow: /
User-agent: Microsoft URL Control - 5.01.4511
Disallow: /
User-agent: DittoSpyder
Disallow: /
User-agent: Foobot
Disallow: /
User-agent: WebmasterWorldForumBot
Disallow: /
User-agent: SpankBot
Disallow: /
User-agent: BotALot
Disallow: /
User-agent: lwp-trivial/1.34
Disallow: /
User-agent: lwp-trivial
Disallow: /
User-agent: BunnySlippers
Disallow: /
User-agent: Microsoft URL Control - 6.00.8169
Disallow: /
User-agent: URLy Warning
Disallow: /
User-agent: Wget/1.6
Disallow: /
User-agent: Wget/1.5.3
Disallow: /
User-agent: Wget
Disallow: /
User-agent: LinkWalker
Disallow: /
User-agent: cosmos
Disallow: /
User-agent: moget
Disallow: /
User-agent: hloader
Disallow: /
User-agent: humanlinks
Disallow: /
User-agent: LinkextractorPro
Disallow: /
User-agent: Offline Explorer
Disallow: /
User-agent: Mata Hari
Disallow: /
User-agent: LexiBot
Disallow: /
User-agent: Offline Explorer
Disallow: /
User-agent: Web Image Collector
Disallow: /
User-agent: The Intraformant
Disallow: /
User-agent: True_Robot/1.0
Disallow: /
User-agent: True_Robot
Disallow: /
User-agent: BlowFish/1.0
Disallow: /
User-agent: JennyBot
Disallow: /
User-agent: MIIxpc/4.2
Disallow: /
User-agent: BuiltBotTough
Disallow: /
User-agent: ProPowerBot/2.14
Disallow: /
User-agent: BackDoorBot/1.0
Disallow: /
User-agent: toCrawl/UrlDispatcher
Disallow: /
User-agent: WebEnhancer
Disallow: /
User-agent: suzuran
Disallow: /
User-agent: TightTwatBot
Disallow: /
User-agent: VCI WebViewer VCI WebViewer Win32
Disallow: /
User-agent: VCI
Disallow: /
User-agent: Szukacz/1.4 
Disallow: /
User-agent: QueryN Metasearch
Disallow: /
User-agent: Openfind data gathere
Disallow: /
User-agent: Openfind 
Disallow: /
User-agent: Xenu's Link Sleuth 1.1c
Disallow: /
User-agent: Xenu's
Disallow: /
User-agent: Zeus
Disallow: /
User-agent: RepoMonkey Bait & Tackle/v1.01
Disallow: /
User-agent: RepoMonkey
Disallow: /
User-agent: Microsoft URL Control
Disallow: /
User-agent: Openbot
Disallow: /
User-agent: URL Control
Disallow: /
User-agent: Zeus Link Scout
Disallow: /
User-agent: Zeus 32297 Webster Pro V2.9 Win32
Disallow: /
User-agent: Webster Pro
Disallow: /
User-agent: EroCrawler
Disallow: /
User-agent: LinkScan/8.1a Unix
Disallow: /
User-agent: Keyword Density/0.9
Disallow: /
User-agent: Kenjin Spider
Disallow: /
User-agent: Iron33/1.0.2
Disallow: /
User-agent: Bookmark search tool
Disallow: /
User-agent: GetRight/4.2
Disallow: /
User-agent: FairAd Client
Disallow: /
User-agent: Gaisbot
Disallow: /
User-agent: Aqua_Products
Disallow: /
User-agent: Radiation Retriever 1.1
Disallow: /