For sure, they all were.

This isn't even the beginning of everything I want to say about this episode, but my sisters and I were talking about it earlier and one of them made a really good point - if Will is high all (or a majority) of the time, shouldn't the others feel it and shouldn't this affect them too?! Because of the logic of what effects their emotions can have on each other/when they feel something someone else is (not always by choice), how is each one of them not high or wanting a hit if he's addicted? I'm assuming he'd have to be by now given how much time has passed and how frequent his drug use is. IS THIS A MASSIVE PLOTHOLE?!