[quote name='Grand Wazoo' timestamp='1353586734' post='1876275']
Ped reference your recent spammers attack, the only solution is to ban all proxy servers, people will have to log in only through genuine internet providers, yahoo, gmail, btinternet and similar. Once you do that you will see a massive drop in hackers, spammers and bot's multiple registrations.
Of course when you do that you can forget about those astronomic figures of visitors that you've quoted in the first post of this thread, but glory was never built on numbers and I would say that perhaps quite certainly 70% of those visitors represented illicit potential threat, that and the various search engine gathering data. The human contingency in those figures is minimal compared to the other "baddies" I've mentioned.
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I'm fairly sure there is no way all the proxy servers can be blocked as there are probably millions of them out there. A hook could be put together to block some, but it would only block approx 75% of proxy servers, and my SQL just isn't that good!
Another thing to consider is that some Universities, Companies or even Countries, like Singapore, access the web through a gateway proxy. So users coming from that country or using connections from Universities, Libraries or Companies that get access online through proxies will be blocked. It may affect some AOL users too.