If Cobes was ever offered meth he'd likely accept that offer immediately, but it's hard to say for sure. I think Clint mentioned that the exact day Cobes turned 21 he began drinking and smoking. It's kind of strange to believe that he would wait patiently for an arbitrary day but then also be so obviously eager to consume them that he starts immediately.
I think people with Autism struggle with morals so they follow rules more rigorously because of that, and since Casper supposedly has such a bad meth problem I wouldn't be surprised if his parents and school drilled into his head from a young age how bad meth is.
So it could very easily be that he would avoid meth as much as possible out of habit but he could very easily pick it up at any time, it'd probably be down to his mood whenever he was offered some.
Josh is one those “When the cats away, the mice play” kinda guys with rules, right.
His smoking inside, for example. Susie gave him a stern talking to about that, along with his father. For a little bit, he’d follow the rules and go smoke outside. A week passes, Josh thinks “Fuck it, nobody’s really watching me, I’ll just open the window. Put some towels under the doors.” Another week passes, half the time the window is open. A month has gone by and he’s already back to just smoking inside again.
This is really indicative of everything he’s told not to do, how he treats any rules. The only difference is that now, there are a legion of weens who’ll just call his dad or the apartment complex whenever he starts to fuck around.
Now he doesn’t do it on camera anymore. He’s doing it off camera, and you can tell he’s doing it off camera purely based on his window being open so often that his house is infested with flies. His smokes are always on his desk, not in his jacket pocket where they’d usually be if you were always going outside to smoke.
People always think he’s about as dumb as dirt. Sometimes he is, but they underestimate how crafty and sneaky he can be. Gotta keep your head on a swivel with him. lol