Office pet peeves

Working in an office is misery for me because I'm too easily distracted by everything. The biggest issue I have now is the cats staying quiet during conference calls or Sushi wanting to sleep on one of my laptops. The dirty coffee mug story in here reminds me of what I would do...throw the things out until there were none. I think I did that with a roommate ages ago who refused to clean...anything. Passive aggressive? Absolutely.

What's your biggest office pet peeve?