I now have an 11,500-line hosts file.
( Started reviewing my old one and couldn't stop - ended up increasing
it by 10x after about 2 days' work trawling through the Security
sites)

My bandwidth is no longer being pummelled by advertising and other
crap I don't want to see.

Especially useful to nail that 2% of PCs on your network that use 25%
of your internet bandwidth......stick my Hosts file on them to sort
them out.......

Here is a tiny snippet: (If you want the whole thing....I can ftp it
to you if you want, or something...I don't imagine 11,500 lines would
go down too well here....)

ads.vitalix.net #[images.accessmedia.tv][Trojan.Muvipaz]
ads.vnuemedia.com
ads.wanadooregie.com
ads.weather.ca
ads.weather.com
ads.web.aol.com
ads.web.cs.com
ads.web.de
ads.web21.com
ads.webads360.com #[IE-SpyAd]
ads.webattack.com
ads.webfever.kadserver.com
ads.webheat.com
ads.webhosting.info
ads.webmastersdirect.com
ads.webnet.advance.net
ads.webshots.com
ads.websponsors.com
ads.whi.co.nz
ads.winsite.com
ads.wunderground.com #[SecuritySpace.WebBug]
ads.x10.com #[SpySweeper.Spy.Cookie]
ads.x10.net
ads.xbiz.com
ads.xtra.co.nz
ads.yadio.com
ads.yazzle.net
ads.ynot.com
ads.yourfreedvds.com
ads.zdnet.com
ads.zebest-3000.net.kadserver.com
ads.zedo.com #[McAfee.Cookie-Zedo]
ads.zone-media.com #[Troj/Swizzor-CN][TROJ_SWIZZOR.EJ]
ads.z-quest.com
ads0.revenue.net
ads001.webwombat.com.au
ads05.bpath.com
ads05.freecity.de
ads06.bpath.com
ads07.bpath.com #[SunBelt.BPath.com]
ads08.bpath.com
ads09.bpath.com
ads1.activeagent.at