Battling with ideas

In Serial Experiments Lain, human individuals are described as containers of information that drive their behavior. Indeed, many harmful acts today are done by ideas – many a group of people with the same idea.

Traditional writing (like this one from a think tank) can no longer sway me. What it to say that it will work on someone else? How do you “remove” an idea from someone’s mind? Must we fight clutter with more clutter?