It seems that different personality types respond to information about things like PO differently, but these can be broken down to four main response types:
1. The "ignore it and do nothing" mentality: these people are, on a subconscious level, normally afraid of change, preferring the idea of comfort and safety to the reality of effort and potential hardship. They will aggressively oppose any attempt to alter their ways of thinking in regards to things like Peak Oil. It will be exremely difficult to wake this person up, so to speak--until, as it's been so eloquently put, TSHTF.
2. The "huh?" mentality: this person needs more information before making a decision about what to do. This is a healthy first approach to have--but it will be essential for this person to actually make a genuine attempt to acquire the knowledge, and then to act on what he or she learns!
3. The "sky is falling" mentality: these people subconsciously want change, and feel that urging everyone else to see the worst case scenario will help bring the change to fruition. Personality 3 is also usually kind-hearted, and wants the change for beneficial reasons, it must be said (i.e., saving the ecosystems, saving lives, encouraging self-sufficiency). In the end, it is important for this person to spend more time preparing for (in this case) Peak Oil and less time trying to convince others of approaching doom, even if it is imminent.
4. This fourth person says nothing to the first, and much to the second, but only as much as necessary to the third. It is this person who is most prepared for cataclysmic events when they do occur, and most prepared to help everyone else become accustomed.
These personalities can be summed up in a teaching that has been around for hundreds (if not thousands) of years before we were born:
He who knows not, and knows not that he knows not, is a fool--shun him.
He who knows not, and knows that he knows not, is a child--teach him.
He who knows, and knows not that he knows, is asleep--wake him.
He who knows, and knows that he knows, is a wise man--follow him.
Of course, the teaching is excellent for describing human states in many other contexts as well.