If I sounded like that, I should have spent more effort. Sorry.
What I was trying to bring across, is that it is "public space" which implies it equally belongs to everyone. But that this is not the case for what you are allowed to advertise. Corporations, or at least "those with connections and/or money" are allowed to be heard a lot more than anyone who lacks these connections or funds.
I call that "skewed". A fair and level "public space" would give anyone, regardless of how much money, connections or lawyers they have, the same ability to present their message.
I am not saying that this would always be a good thing; because this probably means far more advertising noise. It would probably turn our streets into a printed version of twitter. Ugh.
I am trying to say that in order to make this less skewed, "those with money, connections and/or lawyers" should also not be allowed to use that public space to deliver their messages. That is a level playing field too!