Kangaroos can cause damage to fences, compete with domestic livestock for grazing and water, and graze and trample crops. Some individual kangaroos harass or threaten humans at picnic areas where they have become accustomed to being fed by members of the public.Click to see full answer. Similarly one may ask, why should we kill kangaroos?The kangaroo is one of Australia’s cultural icons, but these peaceful animals are hunted by those who want to use their flesh and skin or by farmers who want the pasture where they’re found in order to graze forcibly bred introduced species such as cattle and sheep.Beside above, are kangaroos a problem in Australia? But there are more than twice as many kangaroos as people in Australia, according to official government figures, and many Aussies consider them pests. Landholding farmers, called graziers, say that the country’s estimated 50 million kangaroos damage their crops and compete with livestock for scarce resources. Thereof, are kangaroos overpopulated? It makes its case by playing off the common misperception that kangaroos are hugely overpopulated. In reality, there isn’t much good science to back this argument up. Kangaroos are a slow-growing, slow-reproducing animal. These animals are not being killed to protect the environment nor to control their population.How do kangaroos benefit the environment?At such large numbers kangaroos graze on grassy vegetation until it is like lawn, which leaves no shelter for other animals, such as insects, birds and reptiles. Managers of conservation areas have resorted to culling to reduce kangaroo numbers in several areas.