That's not a thing. Nobody is getting grilled coming in early for their stimulant medications. They just say "come back in a couple days" and "have a nice day." I've filled multiple stimulant meds in a period of 2 weeks from the same doc and same pharmacist. Neither care (I dumped out a drug that had side effects so I needed something else).
If people double up, after they run out they just don't have pills for a few days until they get another fill.
So running out of meds is something that's highly disruptive to my life and I'll always try and minimize gaps if they do occur.
You said " Nobody is getting grilled coming in early for their stimulant medications" ?
Okay then.
What possibly would be left over?
Unlike, say, antidepressants, there's no real backswing on off days: you just revert to your pre-medication attention levels which, especially in the case of people who got diagnosed later than usual, they have coping mechanisms for.
This results in the average ADD-medicated patient having a couple pills leftover each month.
And honestly? Why is this even being discussed, as if college kids getting adderall to study for math tests is some societal scourge ruining lives or something? Who gives a shit and why is it an issue that justifies making life difficult for people who are prescribed it?