I would not like this - we don't use ounces for water in the UK - we use ML and L. They make more sense.
it's already irritating that we have our country names written like a US state in our profiles - i.e. England 'EN' and Scotland 'SC'
and it's also annoying that loads of measurements in the database are in 'cups'. what does that even mean? why not grams??
So no to this.
Why? Because the database is largely user-entered, and that's what the users entered. If you don't like it, you're free to use a different entry or create your own.