What if that guy is just trolling you all? IMO, I can sense that there's the obvious on it and I don't think that it is a motivation and it's just possible that he's having fun with you all.

But let's say that it's a serious one, you can't also determine that the guy posted that is already addicted just because of that quote. He might just stomped into it and just want to share it with you so, you can think of your actions.

I don't know but for me, we need more information about the guy and his habits to say that he's already addicted not just by a single quote he shared.