Which do you hate more, people who actually smoke pot, or your stereotype of people who smoke pot?
This goes back to the classic baby-boomer, hippie attitude: freedom = "I gotta be me, I'll do what I want, whatever feels good, damn the consequences."
Do what Zon suggested in a previous post, then. If potsmokers hurt you so badly, sue a potsmoker in civil court. If you've been hurt so badly, you obviously deserve damages.
The rest of us are still waiting for this most pampered, self-indulgent generation in American history to grow the hell UP!
This leads me to believe you have a problem with stereotypes.