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In general, such a rule makes it an offence to join the action from too far upfield and to gain an advantage by loitering in the vicinity of an opponent's goal in the hope of a long ball. It is generally believed that such loitering would damage the enjoyment of the game of both spectators and players.
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The offside rule in field hockey was eliminated in 1996. There is a wide perception that it has improved the game and that the feared tactic of goal hanging has, in general, failed to materialise.