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Right now to prevent cheating if you quickly refresh a question page from the same IP it will count it as only one view.

What happens though when stackoverflow opens its doors to IPv6 where it will be very easy to get millions of IP addresses on a single server - maybe even a home computer? There will be no easy way to tell who's who..

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I'd say either obsolete those badges (just don't reward them anymore) or change it to the equivalent of an IPv4 address-sized IPv6 subnet. – Daniel DiPaolo Jun 14 '11 at 21:23
I think your underlying assumptions might be incorrect. 1) The purpose of IPv6 is not to give each user a million IP addresses, and 2) Users can already rotate their IP address using various IPv4 compatible methods. – Robert Harvey Jun 14 '11 at 22:37
@Robert: I agree, I never said that it was the purpose or that this is not possible with ipv4. I'm just saying that it's extremely easier than with ipv4. For example on tunnelbroker.net you can get with an online registration, for free, a /48 prefix: that's 65,536 IP addresses. Find me a site that gives you even 3 ipv4 addresses for free! – Andreas Bonini Jun 14 '11 at 23:42
@Daniel: change it to the equivalent of an IPv4 address-sized IPv6 subnet => I don't think this is possible as it's completely plausible (and will probably happen) that an ISP just gives a single, consequent IPv6 address for each of its clients. – Andreas Bonini Jun 14 '11 at 23:43

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