Well Camille the farmers and grain growers etc aren't too fond of them as they can do a lot of damage to crops etc and as Sydney Duck said they can be a pest on the country roads,just like your Deer etc.
We've been going thru a big drought here and the 'Roos don't breed during a drought, they're smart but I heared that the 'roo population is at it's biggest ever.
The Kangaroo and the Emu are on the Australian coat of arms,as neither animal can take a step backwards, unlike most other animals.
Regards............Texas Tall