Basic points everybody goes through in such things:
1)herd mentality-everyone follows everyone else and not a radical minority(PO people of first days were radical minority or Jimmy Carter)
2)follow the leader or trendsetter(all of those however are now in denial as their success depended on current oil dependent system)
3)never heard of it, not correctly presented(light bulb did not go on in head) or not by the right person(my most trusted TV news anchor, politician or actor or best friend).
4)personally not a specialist, too many conflicting opinions of experts, can't be sure(see global warming debate up until recently)
5)I see no real evidence as of today. the government would have certainly taken emergency measures, I mean like,the CIA must have known about it, right?. Even if it is real what can I do to change anything?
6) I am convinced, a peaknik, depressed and scared. I am now an outsider, a Cassandra(all of us here).
7) Late adapter - only watches soaps and plays computer games, PO becomes mainstream knowledge, TSHTF, shocked and screwed when pizza delivery service comes only by foot after two hours and the electricity is cut off in rolling blackouts.

still in denial way past peak-" it is all just a conspiracy of the trilateral commission, etc., etc. etc. "
9) Dead - buried with his pick up-on his tombstone the words "The American way of life is nonnegotiable"