The Pointlesses are more a clan than an individual. They readily admit they have no prior experience or knowledge of anything to do with the topic under discussion. However they feel they have to register their vague approval/concern/disgust. Yes, and these people can vote.
Mrs Ramble was very old and lived during World War 2 don't you know. Therefore she wil meander on about God knows what while the presenter goes all misty-eyed 'cos hey, grannies, you know. Then she will casually drop a bigot-bomb into conversation that can quite easily take out most of central London...
(apologies to Private Eye)
Mr Giggler is an office joker who will call up to attach to any discussion the latest bit of e-mail spam circulating regarding the issue discussed, passing it off as his own 'hilarious' wit.
OK, I'm gonna blow this one open - you can add newspaper letter-writing types as well. Ain't I a sweetie?