Honestly I’m just wondering what would count as advertisement for this, because it effectively bans any form of political campaigning, by candidates or ballot measure groups, except through public speaking events.

You could even say door to door sales and solicitation would be banned, which immediately drags the law into a knock down drag out with the Mormons and JWs, because otherwise they can’t send their impressionable young members out to be screamed at and treated like nuisances so they come back to the fold jaded about “worldly” folks.