You're implying that people are too stupid to know what they want so we have to prevent politicians from advertising to them because they'll be fooled. That's very arrogant. The idea of democracy is people get whatever they want - if they're stupid and get something bad, they'll learn their lesson next time. If they don't learn their lesson, they'll continue to suffer from their own personal choices. That's freedom - you don't have the right to dictate to somebody else what's best for them. They might value things that you don't value and are actually better off with what you think is a wrong choice.

I think this is a common attitude of democrats about Trump voters - nobody could be that stupid, so they must have been fooled by Russian interference or fake news or secret targeted ads. But actually they voted for what they wanted and are very happy now that they've got it. They're not going to get their coal mining jobs back, but that's not the point. The point is to give the middle finger to the "liberal elite" who seem to be oppressing them. That gives a genuine sense of satisfaction.