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 unique ID.
- I know that I could store entries in a table with IP/ID, but what if there are more than one user coming from the same IP?
- Is there a way to uniquely identify visitors without it being tied to their external ip?
- If created a GUID, store it in a cookie on that machine, could it be retrieved later on that same computer with the same IP? A different IP?
Any thoughts on these questions, or any insight to a better approach would be greatly appreciated.