A shopping mall which you can't leave and in which you aren't allowed to bring your own drinks with few exceptions.
Mind you, I'm annoyed at the liquids thing given I used to routinely bring bottles of wine or a local liqueur home in carry-on. And I can't any longer.
He then went on to what he considered dangerous and mentioned a couple of powders which you can easily bring on board which are much more devastating.
So this is why we also can't bring own cocaine on board in addition to not having own booze. What a shame