We've tried damn hard on our PICU.
Usually, patients respect that they need to go outside to smoke, but
we get the occasional hiccup.
The main problem we have is patients smoking as an anti establishment
thing.
We regularly raise non smoking at the ward community meetings and then
issue offenders with a warning.
If they persist, then lighters and / or cigarettes are removed.
We haven't yet had to forcibly remove said items