do the "wiener linien" want you to turn your brain off?

as i took the subway this morning, i recognized that the "wiener linien" installed screens into their trains. not such that show you the previous and following stations but such that display commercials. video projectors in the subway stations that show these adverts have already been installed years ago but now we're also flooded with these spots while we're on the trains. personally i'm really against these screens. no, not against the screens but against their purpose. while you're on the train, you may be bored and you may look around. these screens attract your attention while you're looking for something to look at. you're doing that unconciously. and while you're staring at these screens you're being filled with commercials, without you recognizing. when you're watching the commercials on these screens, you turn your brain off. if there were critical messages on these displays people would maybe start to think. i'd really like to stick disturbing messages onto these screens, to make people's brains work again.