> Vulnerable people do and always will exist.
Hear! Hear! Not to mention that children are even more susceptible than adults, and they do not get a choice in their exposure to advertising. There's so much "think of the children" talk to justify intrusions into privacy, but little to be heard (in North America) of exposing them to manipulative marketing tactics _specifically_ designed to wiggle their way into young and adult brains, alike.
I'm strongly in favour of protecting ourselves from advertising in publicly visible areas. Fill it with nature and beautiful things (i.e. art). It's our world, and nobody has a right to our attention.