Adverts which use very sly methods like subliminal images (images which are shown so quickly the viewer doesn't consciously realise they saw them) are already banned. The other forms of advertising are just companies being creative. There is no difference from supermarkets being painted bright colours to make their food seem more appetising or even people wearing make-up to improve their image. People make unconscious judgements all the time, and we frequently try to influence these choices by the way we present ourselves. This isn't brainwashing, so neither is advertising.