Halliday & Matthiessen (2014: 239):
Most typically the Recipient/Client is realised by a nominal group denoting a human being; especially a personal pronoun, and most commonly of all a speech rôle (me, you, us), e.g. me in Mae West’s famous line Peel me a grape! But this is not necessarily so; the Recipient is a plant in did you give the philodendron some water?, and an abstract entity privilege in we... have today been given the rare privilege to be host to the nations of the world on our own soil. Nor, of course, is the ‘benefit’ necessarily beneficial: Claudius is Recipient in Locusta gave Claudius a dose of poison.