That's bush league and counterproductive and is more likely to inspire a player to give up than to play harder.

Players play harder for the fans that support through thick and thin.

Booing a player or coach is akin to watching a niece or nephew who's still learning the technique of walking, trip and fall in a mud puddle, and so to try to inspire them you heap more dirt and mud on them and tell them they suck, then expect them to jump up and try harder.