The fundamental problem, I think, is that we need to start thinking about postering as we think of spam, as the vast majority of posters I see are for Internet-based businesses ending in ".com". And so once we view the issue in those terms, we can then take the analogy further: should the city be an enabler of this "spam"? If so, why? If most of us don't tolerate spam on a personal level (and junk mail, and flyers at our doors, etc.) through the use of things like spam filters, then why are we tolerating it in the public realm? Why are we allowing opportunistic companies using "public space" and other arguments to wallpaper the city using public assets, and cleaned at public expense in order to facilitate their profits? Why are we tolerating the usurpation of our streetscapes to these companies? Those are the questions we need to ask, otherwise all this fulminating against postering just leads nowhere.
I mean, in my area, I take down *hundreds* of posters every month (and these are along residential streets mostly, as I think I've finally convinced the city to use bag and broom men along Yonge to remove ads on poles, as the guys on the vacuum carts don't). The ones I don't get to, I get the city to remove. This spamming is ridiculous, and it can't continue, and the city can't hide behind the argument, well, the Supreme Court says it's legal, what can we do? Nonsense. BIAs are instrumental in controlling postering downtown along Yonge and in St. Lawrence, and this model should be expanded to other areas.
*This* is the fundamental problem. And, of course, educating people about this in such a fashion, such that I would like to see the city "name and shame" businesses that are constantly placing ads everywhere, and informing them about how much it costs *them*, the taxpayer, to clean it up, and whether you want to support companies who engage in that activity. And it's even as simple of tearing this crap down on your walk to the subway.
Incidentally, this site is an eyeopener:
http://torontoadvertisinghallofshame.org/index.html
/rant