I think it's wrong and causes more problems than the users of it think.
It's almost a communist thing if you ask me. You're controlling somebody without them knowing. The only way to avoid it is to turn off the TV or ignore magazines. Nobody wants to do that though (except me, I don't care for TV and I don't read or look at magazines...I'll stick with spudguns thank you). It's pretty scary stuff really considering I could be doing things I wouldn't otherwise do.
But can it be used for good? If we can get people to by things by putting certain messages/images in an ad...can we get people to stop drinking or stop acting like idiots? I think the brain gets confused the first time it's subjected to subliminal advertising. Normally, by learned behaviour (depending on parents) a person would behave and act normal but add that with a truckload of subliminal messaging and you get a confused brain and a person that doesn't know what to do. This could cause problems but I really don't know since I haven't studied the brain.
What do you guys think?
