You will learn to hate them.

They wreck fences, and one wombat will make a dozen burrows...... Burrows big enough to bog a Landcruiser or break an axle if you hit it at speed.

I asked one of the local Parks and Wildlife blokes if there was a good way to discourage them.
He answered, ".243".

The spread into grazing country seems to be a result of Landcare tree plantings.