And no one can kvetch that it came from SFgate:

A San Francisco neighborhood has come up with a unique way to ward off homeless squatters. A herd of goats is being used to clear away the thick brush on the hills surrounding the Corona Heights neighborhood.

The thickets are popular with the homeless, who set up camps in the brush. Many residents worry that their campfires could spark brush fires, while others complain that dirty needles and other trash is often left behind.

The goats have already eaten enough grass, shrubs and small trees to expose several campsites. Residents say using the goats to clear the brush is a gentle way to encourage the homeless campers to move along. (source)

Personally, I'd prefer to deploy the Get-Lost Hyenas^tm and the Fuck-Off Wolverines^tm, but the clean-up is just going to cost the taxpayers more.