I think so too about harder drugs, but more so I also think they are smoking tons of weed, especially all the guys. I'm pretty sure Vinny actually said it directly during his little interview/confessional during the toilet episode. "I'm filling pipes and cleaning pipes" I know it's a sexual reference, but it also sounds like he smokes tons of weed. Ronnie seems like a major pot head too. They already smoke cigarettes, they dress funny, have all these weird things like t shirt time, they talk funny, have all these stupid sayings, everything is always a big joke, their house is decorated with shit, and they always look stoned. I see them as being nerdy Half Baked connoisseur types. There is also some tabloid press about Mike having prior marijuana charges.