Obviously you have no comprehension of how susceptible people are to manipulation through the subconscious. Again I point to things like hypnotic suggestion, Neuro-Linguistic Programming, seduction techniques. By the way, you do understand what the subconscious is, right? Because you really have to understand the whole notion that we have a subconscious mind in order to understand how we can be influenced through the subconscious mind.
When we don't comprehend how we are being influenced, we don't really have the choice to shake off that influence. You say people could "choose" to take some other line to the discourse in the media etc, but if they are made to think and feel that believing differently is crazy, they won't believe differently. It's on an intellectual and emotional level, if someone is programmed to have a negative emotional reaction to something then they can't choose to have a positive emotional reaction.
It isn't simply a matter of making people copy the symbols they see because they think it's cool. Human beings are basically mechanical, we can be conditioned or programmed without being aware that it is taking place. Subtle influence, diabolic suggestion, it works, basically.
I'm not going to continue responding to you, because you are basically just repeating the same "I don't believe it, it's not possible". You sound like some kind of incredulous atheist skeptic who believes that conspiracy theorists are mentally unbalanced.