Hi there I am mocking up a quick voting poll system, however I would like to put hooks in place to prevent users posting more than once, voting bots etc. Is there a way to prevent them, obviously sessions, cookies, host ips cant be used as they can be removed, and especially with host ips , ppl are usually behind a proxy ip that doesnt forwarding the referring ip. Let me know if anyone has cooked up something like this thanks. I have the voting mechanism and result displaying fine, just the special checks to prevent the form being displayed.
If vote bots are your concern, then you will want to use one of those image generating scripts that create a unique code that only a human can read. It's tough to identify unique users with anything short of testing their clock skew.
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