This idea has been merged into another idea. To comment or vote on this idea, please visit APP-I-6418 On a public ideas portal: require a user account before posting, voting and commenting..
Aha! user should be able to check a box on their public idea portal settings to require "guest" idea submitters to validate their email prior to submitting an idea, commenting, or voting. This would provide a safeguard against SPAM and otherwise abusive users on public portals.