If you think of this system as a game and in this instance a number of users have figured out a way to act within the rules of the game to achieve an outcome inconsistent with IMDB's intended one, then IMDB can simply change the rules to get what they think is best!
It wouldn't be too difficult to observe the behavior of the offending members (vote for TDK, within x hours vote down Godfather...) and simply setup criteria to disallow these actions. You could also set up an algorithm to detect screwy behavior to alert a developer or block that action for a duration.
And hey, we throw error messages for repeated button clicks and such so that click-happy users or spam bots don't take down the system...can't that kind of precaution be extended if necessary? "We know you're in love with TDK, but do you really hate The Godfather...come back in a month if you still do!"
It wouldn't be too difficult to observe the behavior of the offending members (vote for TDK, within x hours vote down Godfather...) and simply setup criteria to disallow these actions. You could also set up an algorithm to detect screwy behavior to alert a developer or block that action for a duration.
And hey, we throw error messages for repeated button clicks and such so that click-happy users or spam bots don't take down the system...can't that kind of precaution be extended if necessary? "We know you're in love with TDK, but do you really hate The Godfather...come back in a month if you still do!"