It's because of people trying to game the system - they want to exploit weaknesses in the computers running the site.

Perhaps, if necessary, to undermine them from within and exploit their weaknesses.

"He's really good at exploiting the defense's weaknesses," he said.

Then they were supposed to go out and exploit each other's weaknesses, which is the essence of tennis.

They're so disciplined you can't exploit their weaknesses as much.

"At our council this morning, we shall find a way to exploit the wizard's weaknesses."

"It's not like we can exploit each other's weaknesses," Prince said.

And he was facing the Sunset pitcher who could best exploit his weakness.

If he could threaten her flank, she couldn't drive troops around to the west to exploit his weakness.

In Iraq, he can exploit the insurgents' greatest weakness: they have no positive agenda.