People that feel the urge to keep pressing the button for the crosswalk light. Pressing it once is fine! The light does not change faster because you keep pressing it!

People that do not return my phone call when I really need to speak with them. I left a message and a number so please call me back damn it! I would rather not nag but urgent business requires quick response time!

Applications on facebook. I use this to keep in touch with people, not play stupid werewolf games, do pointless quizes, and other such stuff!