Implementing a voting system without requiring registration

Question

I\'d like to implement a voting system on my site, without having to force them to create an account. They would ultimately be voting up/down a piece of content which has a

Answer 1

You could identify users based on more than just their IP. For example you could include the IP + the entire request header information (such as Browser, Version Numbers, Capabilities) and hash that. That will more or less uniquely identify your user (not 100% though, unfortunately.)