Re:Trolls are winning the internet, technologists say
by wallacoloo on Saturday April 01, 2017 @01:01PM
(#14013010)
Or don't accept requests from known Tor exit nodes and open proxies. Lists of these do exist, though you'll have to pay.
Or even charge a one-time $1 to sign up, and then free wake-up calls for the life of the account.