Hunting cheaters in a voting competition

Question

Currently we are running a competition which proceeds very well. Unfortunately we have all those cheaters back in business who are running scripts which automatically vote f

Answer 1

Check the domain details of the email they are using. I had the same problem and found that all of them were registered to the same registrant. I wrote it up here: http://tincan.co.uk/659/news/competition-spammers.html

Now, I filter on the DNS information for the email used in the registration.