I think just about every school in the land has one or two kids in each year who spend their lunch money on Monster/Red Bull (Caffeine is addictive - they cannot help it).

Sadly, there is often only enough money for caffeine or food: So you end up with children who are living off Sugar & Caffeine. They look as healthy as you'd expect.

This legislation is as much about preventing such scenarios as it is about the effects of the energy drinks themselves - (not that it'll work, but that's a another point entirely)

As for the tea/coffee points - I don't think any school allows access to a kettle - it is already a moot point.