People are too gullible and susceptible to suggestions. In 1997, a 14 year did a science fair project on the subject, convincing 43 out of his 50 classmates to ban the made up chemical Dihydrogen Monoxide. There are a lot of other examples. Fox News constantly says things that are proven false but people believe the information.
Yes, people follow what a person, especially if they are popular, suggests. People use suggestions because it's easy to get people on your side, especially if the people the suggestions are meant for don't know anything about the subject. A suggestion is so powerful, it doesn't even have to have any facts attached to it. If the suggestion sounds good, people will go with it.
People are highly susceptible to suggestion. People are influenced by the strangest things and sometimes we make decisions because of random bias. We should be aware of our bias and how our opinions and actions can be shaped by priming. In psychology, these actions are known as priming. And we humans are primed often. As advanced decision makers, we need to make sure we are making important decisions for the right reasons and not just because of being primed.
There are too many people in our nation who are unwilling to do their own research. Just because one person claims to have researched a topic does not mean that he has all knowledge on that subject. Granted, Dihydrogen Monoxide is a toxic chemical, but how many of this boy's classmates knew that before they saw his science fair project? They were willing to base their opinion on the research of one, 14-year-old boy. It is much wiser to research a topic yourself before forming an opinion.