> but one day they could suddenly start ranting about their own political opinions or crazy beliefs.

Why is this a problem? I don't mean to be confrontational here, but by this I mean: is it about them being "crazy", or us not being able to hold complexity and ambiguity? Politics has to emerge somewhere, and it's not like we have third spaces for these rants in our modern world (save for a few die-hards at your local town-hall meeting).

Also, I think cartoon politics is something that tends to emerge out of somebody's experience. Often it is armor. I think if you learn to not take them at face value, then it can really give you a quick insight (not always accurate) about what makes somebody tick.