I've smoked more trees than most people have seen. Not bragging, certainly not proud, just a fact. I know and have seen people "wig out" off of just weed. The stuff on the street today is NOT what older folks are used to puffing.
My issue with Mary Jane isn't those who flip out after toking. My problem with weed is the fact that it is a thief. It robs too many of their ambition and drive. You seldom hear of a pot head being violent. However, you will rarely, if ever, hear of a pot head being an innovator.