And to Ashes80:
While some are more resistant than others, we are all actually prone to it. Take the major corporations subtle use of advertising as an example. Though the ads are usually about 30 seconds or so, they successfully convince us to buy their products, and influence our attitude towards them. As I noted in the previous comment, Derren Brown has a few videos just on this subject, and how they craft these ads to appeal to us on a sub-conscious level so they stick with us. There are also other techniques, such as "mirroring", which is a calculated synchronization, and is highly effective when done properly, and
also "positive reinforcement", which the financial industry uses to get people to purchase/ use their services. This is achieved through a "reward", usually a tempting incentive, to attract and keep customers. Much like giving chocolate to a person whenever they act in accord with what the user perceives to be considered "good behaviour, over time people conditioned by this will repeat this behaviour seeking to be rewarded. They also use this to train animals like dolphins.