Some examples:
- A news station giving daily "terrorist reports". It doesn't actually say how to protect yourself, just gives information on how horrible they are & why you should be afraid.
- A airport that forces full body searches. The odds of an attack are still about zero, but passengers will believe there is a huge problem because of the extreme security measures.
- A person never leaving the house without at least 2 firearms. Their fear of an attack is increased by buying & carrying guns, but the chances of them needing to use one is still very low.