Ranchers, in general, want to kill the wolf: it preys on cattle, sheep, horses and dogs.

FORBES: Kill The Wolf

"It really preys on paranoia about the Sasser worm, " said Graham Cluley, senior technology consultant for Sophos.

CNN: Sasser worm rips through Internet

All of the complexity in our tax system, in turn, may actually facilitate unscrupulous behavior that preys upon taxpayers.

FORBES: Decoding The Tax Law

All those children have been targeted by a massive, multimillion- dollar media campaign that preys on their insecurities and their dreams.

CNN: President Bill Clinton On Tobacco Legislation

But banks argue that the rule actually preys on them.

FORBES: Volcker Rule Is Out, How Much Will It Hurt?

Nor was anyone in the Valley prepared for the infestation of phylloxera, a tiny louse that preys on the roots of grapevines, which devastated European viticulture in the 19th century.

WSJ: The Near-Accidental Brilliance of Shafer Vineyards

It preys on every conflict.

BBC: NEWS | UK | UK Politics | In full: Tony Blair's speech

Roelie Post, who as a European Commission official dealt with adoption in the run-up to Romania's entry to the European Union, has written a book on her experience of dealing with what she sees as a powerful adoption lobby that preys on weak and poor countries.

ECONOMIST: International adoption