That’s why we live in a nanny state exactly that reason.
Do... do you think we all live in the same state?
(let's not start thinking the world revolves around us like some Americans do)
There's almost 200 countries in the world, how many are nanny states, I wonder? Interesting thought actually!
How is this invading someone's privacy? All it's doing is detecting if children are smoking in a room or space at school and then putting an alert up about the detection on a screen.
They have zero right to privately smoke at school, or anywhere for that matter, smoking is illegal for children and not something to be taken lightly.
Similarly, adults have no right to privately smoke whilst in the workplace in the bathroom or other non-smoking designated areas. This is also illegal and not to be taken lightly.