Sometimes it's not enough to just not record a show. Sometimes you want content to not exist on your television. How about an option for "Change Tuner on 3-Downvote Content Beginning"? Disabled by default. You could still intentionally tune to the content if enabled. It would be overridden by a user-directed Record action. Otherwise, the tuner would automatically pick any other non-3-Downvote content at the start of the unwanted content.