I would be happy to see a ban on political signs. They create a mess and I assume that our tax dollars end up funding the litter removal after the campaign, or the winter, which ever comes later.
I would not make a political decision based on yard signs but there are many "low information voters" who will never watch a political debate and spend little or no time watching the news to keep themselves well informed. And, unfortunately they vote. It is just my opinion but if there were an intelligence test to qualify to vote many elections would turn out entirely different.
Here is an example of a real talk show with a low information voter:
https://www.youtube.com/watch?v=IpCHvHWUAvw