It's best not to annoy nerds, because their technology ninja skills have the ability to wreak havoc with your life.

Next time you ring up IT with a stupid question like 'how do I connect Excel to the internet?' beware the scornful laughs coming from the other end of the phone. That ponytailed guy with the Battlestar Galactica t-shirt is almost certainly plotting your computer-based downfall.

Luckily this pair of geeky prank pics are pretty harmless, but the fondness for profanity suggests there's a lot of anger bubbling under.

Here's how a neglected web designer recently quit his job, with a charming custom-made dialogue box left on his desktop:

And here's a great way to express your feelings about needlessly complicated smartphones using iPhone app icons: