A change to the Webform module to allow for cookies as the only type of validation for a user. Less secure, but allows several anonymous voters behind a single IP address to vote freely on a Webform.
Changing the option in admin/settings/webform from:
[ ] Allow cookies for tracking submissions
To something more like:
Track anonymous submissions by:
( ) Cookie (least secure)
( ) IP Address
( ) Both IP Address and Cookie (most secure)