Your Opinion Kills Puppies

The tendency of authors to dismiss a philosophy, political point or other abstract opinion by attributing it to a nasty character. Nobody actually disproves this nasty character's abstract principles - but he goes around killing puppies! You don't want to be like him, do you?

This is often used in dispute scenes between Our Hero and Mr Killspuppies. In such scenes, the message is not 'These people are wrong for a reason', but 'These people are bad so you don't have to listen to their arguments'. The conversation goes like this:

Hero: The sky is green!
Mr K: No it's not, it's blue.
Hero: I don't have to listen to this crap, you kill puppies!
Mr K: Darn right I do! Blue skies rule. Hey look, a little Pekinese! Where's my hammer?