Interesting. Seems so unlikely for a party down at the more polarizing/marginalizing end of politics. Still, besides the point for the most part.
Hmm. Tricky. There are hot-button issues that I get really completely unreasonable about, which makes if difficult to maintain the level of detachment needed to properly fuck with political canvassers. A large anarchist flag and a Free Nelson Mandela sign on the front door was my go-to back in the day. Would still work now, but with a much more surreal note to it.
How about playing “Wait-a-mo”? Keep a notebook and stopwatch by the door, when one knocks, say “Wait a mo” and start timing how long it takes before they leave. Keep a league-table posted online to see who wants your vote the most.