potheads are not, never have been and never will be the archetypal cool kids.
potheads have always been and always will be the introverts, the ostracised and the socially inept. see, realizing that the data shows that marijuana doesn't create inept behaviour is only getting half of the picture: it misses that these things have become correlated in the popular (mis)conception for the precise reason that people that are already socially retarded are so heavily drawn to it.
so, part of a marijuana legalization strategy should be to stop people that are already losers from using the drug as an excuse to reinforce their anti-social behaviour.
in the end, your average pothead might not become a gregarious social butterfly. but, helping them connect with each other could at least minimize the arresting behavioural habits.