We are social animals not the god's replica, it means we got biases and one of the strongest is that we behave like a flock to ensure cohesion and shared responsibility to increase our survival.

So no people are influenced by everything, saying otherwise is preposterous, it's how we found out about PTSD which we didn't even believe at first to be psychological but physical hence the name shellshock.

The question is how much and what are the ultimate effects of the daily exposure to something.