There would be a chilling effect on speech. People would be afraid to speak or be imprisoned for saying the wrong things. North Korea is the only country that bans advertising.
> North Korea is the only country that bans advertising.
Outright banning, yes maybe. But many countries or local governments severely regulate advertising in one form or another, and no one is crying foul either.
They didn't start out banning those ads. Those ads were banned because they were found to be more harmful than they are worth. We've come to realize that much of the ads we're subjected to these days are also harmful, so it's natural for us to want them banned as well.
Some of us actually go as far as ban billboards, electronic billboards, or even during elections - some counties in Germany limit all kinds of election related propaganda to a few large billboards at the entrance roads, and the rest is kept clean from the bullshit.