I'm thinking of putting the following on our answering machine during the political season:

"Hello. We're not able to come to the phone right now. If you're calling to plead for a political cause or candidate, and wish to ensure we never ever vote for your cause or candidate, please leave your cause or candidate's name and a message about your cause or candidate after the tone, and we'll do everything in our power to try and thwart you. Thank you."