Maybe the
reason for such email in first place was a crew being observed
in uniform to be eating and/or drinking what they shouldn't have iaw uniform policy.
In which case the statement from management seems justified and just badly worded when communicated back to the crew.
This (badly worded or open for misconception) happens
a lot when English is not first spoken language of the writer of such verbatim or (s)he hasn't completely mastered the art of nuances.
