Thanks to members of Daily Kos publishing automated voting code we've had to enforce strict IP checking for the polls. I had hoped that people would be able to conduct themselves in a civilized manner, but apparently that was too much to ask. Once the code got into circulation many of the sites nominated for Best Overall Blog got "help" by automated bots designed to continuously vote.
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.