It's called learning to resist propaganda, I'm pretty sure we're all learning it from a young age and don't even realise it now because we get bombarded with it so often, the only time I realised I was throwing all that shit out the window ( Including religion/state propaganda ) was when the 'crazy' people like Ron Paul and George Carlin were talking about it. That and just doing some basic research will tell you that most advertisement is full of shit, some of them advertise horrible products. This will seem ridiculous but I think I first learned properly about propaganda when I was 13 and had to deal with SOE's infamous arrogance with Star Wars Galaxies which was pretty much one of my only forms of escapism from school at the time, that game was awesome.
p.s. LOL Because I use the same global username to allow people to contact me you could still probably find me ranting and arguing on the old games forums with people saying the exact same things I've been saying about the games industry for years, not that I encourage it *cough cough*