People are all too vulnerable to manipulation through the media and what they choose to read and watch on a daily basis. Young people are especially prone to being led by falsehoods, exaggerations and made-up stories, so it's important to question everything you read, everything you watch, and everything people say. The truth is something that can be turned on its head, muddled with and obscured, but we have a choice to say to ourselves "wait a minute, this just doesn't add up." If we don't question stuff, then we're allowing the deceit to grow and grow until everyone believes in falsehoods and lies.
I suppose a drawback to this way of thinking, is that many people like to group together and be part of a norm, so questioning stuff could be beyond their comprehension and understanding because they'd rather follow and stay loyal to the group.
Don't trust everything and everybody because there are loads of people who can dupe you into believing what they want you to believe. The media are undisputed masters of this art, but you don't need to let them get away with tricking you.