had a strict "no drink or food on salefloor" rule. EVERY one of them. Now, I, as the manager, have always allowed a water only exception. When (not IF) the employees started to take advanage of the fact that I would allow them to break this rule, I too would throw away their non water drinks, and eventually have had to say "sorry, no more water either." (at times)

My guess would be that your letter will bring attention to the fact that an exception was being made and now there will be no more water either.

Even in super hot Arizona employees get breaks and they can drink then, so I doubt that anyone will have much sympathy.

Sometimes it is a good idea to mind your own business, IMHO. sorry.