> This phrasing needs to die.

If we're being annoying about language for no valid reason, I would say that a "phrasing" cannot "die", because a "phrasing" is not a living creature.

> Laws don’t not allow anything, they only sometimes impose penalties if you’re caught breaking them.

How does it work with your parents? Do they cast a spell that prevents you from hanging out with that boy? Nobody was "allowed" to smoke, and yet...

I consider businesses who do this to track customers naughty, and I find their behaviour childish (scriptkiddie level). Therefore, 'not allowed' is exactly the phrasing I like to use in this context, and readers are expected to understand this refers to legal status.

You should also consider not everyone on HN is a native speaker, and consider to focus on the content of posts instead of minor tangents.