Advertising is responsible for all the treason of the 2000-2010 websites that took all the privacy of people in exchange for pity digital beads and mirrors, the cost is an ongoing avertisement harrasment into people's private sphere.
Also due to laziness, complacent and risk adverse handling of the receivers of that advertising money, it made the advertising companies too powerful, while these sell nothing but broken promisses and bullshit, so no value for whatever price.
All the stuff that advertising bought and brought to the people is mediocre and bland.
I personally hope that advertising will face the same "pull the carpet from beneith them" treatment as all the other big media industries like RIAA and MPAA.