TBH, I think it's good that she admits it. I personally wouldn't want to see anyone that smokes weed. The problem with with prossies and palours that allowed weed smoking is if the place was busted, not for drugs, but unpaid taxes, a working flat or unpaid taxes, the weed thing would mean charges are pressed. Whose to say the police wouldn't presume dealing is going on, given the large footfall of punters?
The other thing is discretion, prossies always bleat about this, but if a punter see a prossie that smokes weed it may be smelt on a punter clothes after leaving. Imagine having to explain that to the missus and kids.