All the stock photos about hackers are hilarious:
"Hee hee hee, I'm so EEEVIL hacking this computer."
"Computer locked eh? THIS oughta do it!"
"All I need is a gentle tap and the computer should open up like a Faberge egg..."
"I AM TIRED OF THIS NERD BULLSHIT! HACK THE COMPUTER FOR ME OR I WILL SHOOT YOU IN THE HEAD!"
...Ok, this one could actually work.