have you ever considered that a lot of sober people are about as worst...my sister as per exemple...
sorry i was writing that in reference to your space cadet friend! my sister has never tried drugs, i've always discouraged her against it...but gees! i went driving with her and she is a dangereous one!! she is some kind of spacey as she oftenly, like you said, doesn't even answer my questions!! so my point is that yes, some people are totally dumba*s under the influence of pot but it would be wrong to say that there is more "pothead" dumba*s than drunk dumba*s!
Even if a lot of independant studies are showing that alchool is more harmful than pot, people still sticks to the "it's ridiculous" to compare them!
What is your first language? :) and be careful of making fun of women drivers, you might get attacked by some women here that don't appreciate it. :D