This sort of thing surely proves that they are 'economic migrants' out to get as much as they can from anyone daft enough to let them in. Throwing away food and water in an attempt to stir the consciences of the hand-wringers in the hope that they'll push the authorities into changing their minds.
Germany played the game of showing how generous they can be then, when the penny finally began to drop, decided to follow Hungary's lead and closed their borders.
You see, we the 'heartless ones' on this forum were right all along!