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[–] Calorie-Kin 1 points 31 points (+32|-1) ago  (edited ago)

So much this. I think a better idea would be session IDs. They're non identifying and unique per visit. Something stored as a cookie or something. Link a username to a cookie, and check if said cookie is around when the user is logging as another account. This way, someone who tries to brigade or manipulate votes would have to delete their cookies each time, which makes it uncomfortable, and not as many people will go through the trouble.

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[–] kactusotp 1 points 14 points (+15|-1) ago 

or use incognito/private browsing as an easy/quick work around.

A bigger problem will be uni compasses where thousands might get the same ip.

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[–] FetusChrist 0 points 1 points (+1|-0) ago 

Incognito doesn't change your IP it just doesn't store browsing information on your box.

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[–] Calorie-Kin 0 points 1 points (+1|-0) ago 

Require a cookie to log in. Problem solved.

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[–] Reow 0 points 5 points (+5|-0) ago 

It's not too hard to write a script to do this. You need something beyond a thing the user can manipulate (if they've done IP checking correctly, spoofing shouldn't work). The only real alternative is to monitor voting patterns (e.g. accounts that vote the same way at the same time, etc.).

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[–] 7veils 0 points 1 points (+1|-0) ago 

Self Destructing Cookies kills cookies immediately after leaving a web site.

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[–] InnocentBystander 0 points 1 points (+1|-0) ago 

Not a bad idea, but it is very simple to delete cookies. I don't think it would be very effective.