I used to think that everyone whose pupils were dilated were on dexamphetamine.
Is this due to an experience from your past?
I have been in many situations where I've been influenced by drugs. That's how I know.
It's not nice to assume people are on drugs just because they're eyes are dilated. Someone would be upset if they found out you thought they were a druggie just based off this alone.
Only addicts have dilated pupils.
There are many reasons for dilated pupils, so assuming that all people who have dilated eyes are using is not accurate and it's rude. Don't assume you know something about someone unless you have actual proof.