what to do about this
obviously we can't mount a massive campaign of anti-advertising awareness since we would be doing exactly what we are accusing them of. capitalist competition for hearts and minds is so bloody fierce now that any kind of grassroots movement against it would fail utterly anyway even if taking them on their own ground wasn't riddled with hypocrisy.
so any action has to be in the form of mutual support within communities, I suppose. they could choose whether that was legal or illegal. public space should be reclaimed; if democracy is worth the bucket it's been shat into, local pressure on a local council to remove billboards should eventually pay off. people who get busted for illegally pulling down billboards should be supported by their communities - not that i would ever advocate damaging private property, of course, that would be wrong and naughty.
i like subvertising but it sometimes comes across as a bit too knowing and namby-pamby. being clever is all well and good but perhaps wholesale destruction might pay more dividends.
e-mail is fairly easy to de-spam. phones - less easy. full telephone exchanges are beyond the means of most small businesses and community organisations. I wonder if there are any cheap'n'cheerful number-blocking systems? Communities that trust each other could share info on cold calling offenders. You'd have to be careful that such a system wasn't subverted by false blacklisters blocking innocent numbers to the point where the system has to be abandoned - so keep it local, mutual, within your own physical community. Failing that, we just torch all the call centres.
television - not a problem - about to disappear up its own arse anyway. you can already download the minute fraction of televisual entertainment that has any quality or anything to teach you for free, without adverts, off the net. if the net goes down, we have wireless now - doesn't take much investment to start a local wireless net, self-policed. we'll all be enjoying our work too much to waste time box-goggling anyhow.
lastly, mild shunning of people who do the work. i'm not suggesting anything really nasty. no not pissing on people on fire, for example - piss away. feed them and clothe them if you must. just don't let them have much fun. alternatively, offer them a proper job.