screencracker 

Describes a persons somewhat unappealing expression in a photograph where the photograph is viewed digitally.

The word demonstrates the fact that the expression could "crack" the computer screen from which it is viewed.

That photo on facebook is a screencracker

screencracker by Bob oneill January 1, 2011

screenjacker 

A video game player who looks at an opponent's television, monitor, or display to gain information on their whereabouts or game status.

Every time we play Doom, I catch Tim glancing toward my screen. He is such a screenjacker.

screenjacker by Oden Nauticus January 24, 2005