Robots txt file that show black hat Techniques

Check out this MOFO  big Robots.txt file , surely  there is lot of blocking going on here

A robots.txt file is a short text file that resides in your home directory. Before search engines spider your site, they look into this file to see which files/file types and/or directories they are not allowed to see.

#
#135 robots to keep away - Yellowpipe.com
#
User-agent: Aqua_Products
User-agent: asterias
User-agent: b2w/0.1
User-agent: BackDoorBot/1.0
User-agent: Black Hole
User-agent: BlowFish/1.0
User-agent: Bookmark search tool
User-agent: BotALot
User-agent: BuiltBotTough
User-agent: Bullseye/1.0
User-agent: BunnySlippers
User-agent: Cegbfeieh
User-agent: CheeseBot
User-agent: CherryPicker
User-agent: CherryPicker /1.0
User-agent: CherryPickerElite/1.0
User-agent: CherryPickerSE/1.0
User-agent: CopyRightCheck
User-agent: cosmos
User-agent: Crescent
User-agent: Crescent Internet ToolPak HTTP OLE Control v.1.0
User-agent: DittoSpyder
User-agent: EmailCollector
User-agent: EmailSiphon
User-agent: EmailWolf
User-agent: EroCrawler
User-agent: ExtractorPro
User-agent: FairAd Client
User-agent: Flaming AttackBot
User-agent: Foobot
User-agent: Gaisbot
User-agent: GetRight/4.2
User-agent: grub
User-agent: grub-client
User-agent: Harvest/1.5
User-agent: hloader
User-agent: httplib
User-agent: humanlinks
User-agent: ia_archiver
User-agent: ia_archiver/1.6
User-agent: InfoNaviRobot
User-agent: Iron33/1.0.2
User-agent: JennyBot
User-agent: Kenjin Spider
User-agent: Keyword Density/0.9
User-agent: larbin
User-agent: LexiBot
User-agent: libWeb/clsHTTP
User-agent: LinkextractorPro
User-agent: LinkScan/8.1a Unix
User-agent: LinkWalker
User-agent: LNSpiderguy
User-agent: lwp-trivial
User-agent: lwp-trivial/1.34
User-agent: Mata Hari
User-agent: Microsoft URL Control
User-agent: Microsoft URL Control - 5.01.4511
User-agent: Microsoft URL Control - 6.00.8169
User-agent: MIIxpc
User-agent: MIIxpc/4.2
User-agent: Mister PiX
User-agent: moget
User-agent: moget/2.1
User-agent: mozilla/4
User-agent: Mozilla/4.0 (compatible; BullsEye; Windows 95)
User-agent: Mozilla/4.0 (compatible; MSIE 4.0; Windows 2000)
User-agent: Mozilla/4.0 (compatible; MSIE 4.0; Windows 95)
User-agent: Mozilla/4.0 (compatible; MSIE 4.0; Windows 98)
User-agent: Mozilla/4.0 (compatible; MSIE 4.0; Windows ME)
User-agent: Mozilla/4.0 (compatible; MSIE 4.0; Windows NT)
User-agent: Mozilla/4.0 (compatible; MSIE 4.0; Windows XP)
User-agent: mozilla/5
User-agent: MSIECrawler
User-agent: NetAnts
User-agent: NetMechanic
User-agent: NICErsPRO
User-agent: Offline Explorer
User-agent: Openbot
User-agent: Openfind
User-agent: Openfind data gathere
User-agent: Oracle Ultra Search
User-agent: PerMan
User-agent: ProPowerBot/2.14
User-agent: ProWebWalker
User-agent: psbot
User-agent: Python-urllib
User-agent: QueryN Metasearch
User-agent: Radiation Retriever 1.1
User-agent: RepoMonkey
User-agent: RepoMonkey Bait & Tackle/v1.01
User-agent: RMA
User-agent: searchpreview
User-agent: SiteSnagger
User-agent: SpankBot
User-agent: spanner
User-agent: suzuran
User-agent: Szukacz/1.4
User-agent: Teleport
User-agent: TeleportPro
User-agent: Telesoft
User-agent: The Intraformant
User-agent: TheNomad
User-agent: TightTwatBot
User-agent: Titan
User-agent: toCrawl/UrlDispatcher
User-agent: True_Robot
User-agent: True_Robot/1.0
User-agent: turingos
User-agent: URL Control
User-agent: URL_Spider_Pro
User-agent: URLy Warning
User-agent: VCI
User-agent: VCI WebViewer VCI WebViewer Win32
User-agent: Web Image Collector
User-agent: WebAuto
User-agent: WebBandit
User-agent: WebBandit/3.50
User-agent: WebCopier
User-agent: WebEnhancer
User-agent: WebmasterWorldForumBot
User-agent: WebSauger
User-agent: Website Quester
User-agent: Webster Pro
User-agent: WebStripper
User-agent: WebZip
User-agent: WebZip/4.0
User-agent: Wget
User-agent: Wget/1.5.3
User-agent: Wget/1.6
User-agent: WWW-Collector-E
User-agent: Xenu's
User-agent: Xenu's Link Sleuth 1.1c
User-agent: Zeus
User-agent: Zeus 32297 Webster Pro V2.9 Win32
User-agent: Zeus Link Scout

 

What this tells you is many things  there are a lot of nasty things out there and specifically the names of those nasty things  as listed above . Makes you wonder what these things do.. but thats what google is there for ..Enjoy !! Be good now  !!