> people driving up and down your neighborhood at all hours of the day with a "ad truck"

I doubt that would be an efficient use of money, and that doesn't really seem like crier behavior.

And is that kind of noisemaking legal in most places?

If I need to specify the criers only use their own voice, then consider that specified.

> Imagine if every fedex or ups truck and amazon van you see was also blaring a loud speaker advertising businesses

Blocking that double use is part of why I tossed "independent" into my earlier post.

And door to door salesmen coming onto my property definitely don't count as criers.

> I doubt that would be an efficient use of money

It works for ice cream trucks, and when you ban all other forms of advertising, it's not like there's any more efficient places to spend that ad money.

> Blocking that double use is part of why I tossed "independent" into my earlier post.

So we'd just wind up with fleets of "independent contractors" doing deliveries for part of their income and advertising for the other part. It's not like a bunch of those vans and trucks aren't already contractors in the first place.