I sometimes discuss it with my friends, but I get the feeling they are just humoring me by listening.  Though many of them were grateful when I warned them to fill up their tanks before Katrina hit.  

My sister believes in peak oil.  She went out and bought a hunting knife after I told her about it.  o_O  

My dad actually told me about oil depletion when I was a kid, and warned me about Malthus' Doom.  I was a cornucopian when I was a kid, sure that technology would always save us (and sure I would be part of the solution, probably winning a Nobel Prize along the way  ;-).  Now it's kind of reversed.  I fear the worst, but he doesn't seem too worried about it.  Maybe he figures he won't have to worry about it, since he's almost 70 years old.  Or maybe it's too depressing to consider at this point in his life, when he's living off his pension and has several medical issues typical of old age.  

lol I bought a Glock 23 and a Ka-bar after I found out about Peak Oil...

My mom beleives me, she's actually going to let me hook up some small 12volt mills on her property so i can start to figure that stuff out. She lives in the country and is my 'ace in the hole' for when the anarchy comes. ;)

My dad doesn't really know what to think, I made him watch The End of Suburbia and his only comment was 'That's just their opinion', and he wouldn't even read Twilight in the Desert. I'm sure he'll come to beleive more once he starts getting his heating bills this winter.

Most of my friends listen, and I think they understand it, but I dont think many of them think that it can happen. Although, atleast they think about me from time to time and send me nice cartoons for my desk like this one (its work safe) - http://www.toothpastefordinner.com/110305/ready-set-worry.gif