Anonymous Proxy

Trying to get more control about what my users are doing on internet, this week I released a new rule on squid to avoid anonymous proxy. I know that it is almost impossible to block all anonymous proxies, but I am trying to block them when the users start to use it. I started a list with ten sites and now I have a lot of them, and this list is growing up fast. I am thinking about write some regular expression to avoid a large anonymous proxies list. For now I am showing you all the list (for those who does't know any site). This list is a result of my experiencie with MY USERS. If they discover a new anonymous proxy, they use it for one day and have to look for another one. As they are not expert users for me it is enougth. But maybe a "full" list will be needed on future. I am blocking the following sites (feel free to comment this adding a new site to the list):

.4proxy.com
.a1proxy.com
.a1proxy.com
.alienproxy.com
.alienproxy.com
.aproxysite.com
.bestproxy.info
.bigproxy.org
.cloakproxy.com
.dailyproxylist.com
.daveproxy.co.uk
.demonproxy.com
.doxyproxy.com
.drproxy.net
.dynaproxy.com
.foxyproxy.net
.freehttpproxy.com
.free-proxy.info
.freeproxyserver.net
.freeproxysite.com
.freeproxy.us
.freewebproxy.org
.gigabitproxy.info
.goproxy.org
.httproxy.com
.idealproxy.com
.indianproxy.com
.joeproxy.com
.kproxy.com
.kungfuproxy.com
.kungfuproxy.info
.lightningproxy.com
.lightproxy.com
.masterproxy.info
.mintproxy.com
.mycgiproxy.com
.my-proxy.org
.myproxysite.com
.myspaceproxy.com
.myspaceproxysite.com
.neoproxy.net
.ninjaproxy.com
.nodeproxy.com
.officialproxy.com
.pixelproxy.org
.pokerproxy.info
.proxy7.com
.proxyarcade.com
.proxyboys.net
.proxybrowsing.com
.proxybull.com
.proxybunny.com
.proxy.computersteroids.com
.proxydetective.com
.proxydevil.com
.proxydoll.com
.proxydrop.com
.proxyed.blogiseverything.com
.proxyfox.info
.proxyfoxy.com
.proxygeek.com
.proxyguy.com
.proxyhero.com
.proxyindex.com
.proxyjet.com
.proxykey.com
.proxykid.com
.proxykingz.com
.proxylord.com
.proxy.meetfind.com
.proxymod.com
.proxypi.com
.proxypla.net
.proxy.pn
.proxypop.com
.proxypowered.com
.proxyprince.com
.proxypunk.com
.proxyrocker.com
.proxyrocket.com
.proxy.secretly2u.com
.proxysite.org
.proxysite.us
.proxyslash.com
.proxy-sock.com
.proxysurfers.com
.proxysurfing.us
.proxy-surf.net
.proxysurf.org
.proxytastic.com
.proxytheweb.com
.proxytogo.com
.proxytopsite.com
.proxyvisit.com
.proxywhip.com
.rapidproxy.com
.redproxy.be
.reliableproxy.com
.satanproxy.com
.slyproxy.com
.smart-proxy.com
.smartproxy.net
.sonicproxy.com
.spiffyproxy.com
.studentproxy.com
.sweetproxy.net
.teenproxy.com
.thecgiproxy.com
.thefreeproxy.com
.theproxyfree.com
.tntproxy.com
.ukproxy.com
.w3proxy.com
.webanonymousproxy.info
.websecretproxy.info
.whiteproxy.com
.xxxproxy.com