Book: Plastic Viking Helmets
Coming back soon:
The Great Peoplimo (world famous astrologer) predicts that an oddly clad, highly verbose stranger will be casting a shadow on your doormat near election time. You may personally know a Campaigner, but even if you don't your street will become infested with them and a few will make it to your doorbell.
Campaigners are now believed to be an alien species trying (unsuccessfully) to blend into normal Earth society. Unfortunately they arrived one Wednesday on the eve of an election and their data on normal attire and actions was somewhat distorted.
Campaigners are unable to stop talking, and have a cheery response to even the most drastic insult or rebuff. The campaigner's alien status is betrayed when analysis reveals that not one of these responses is original.