Right, so some ads are different than others. Still, I'm trying to imagine what the web would be like if every site that currently does the "bad kind of advert

Right, so some ads are different than others. Still, I'm trying to imagine what the web would be like if every site that currently does the "bad kind of advertising" put up guilt boxes instead. For one thing, Wikipedia would probably disappear, because all the other sites are competing for people's limited altruism.