Can anyone tell me if huffing that caned air is illegal in Pennsylvania?

I know someone who repeatedly breaths in the keyboard air duster, ya know that high pressure air used to dust off keyboards and what not. In 2 different cities they said it was but the city the person I know lives in say they wont arrest him and there’s nothing they can do and wont [...]

Anybody can tell me what dusting keyboard cleaner, air canned, huffing, and whipits is?