7. Loud and annoying ringtones.I was riding the train to work one morning, when out of nowhere the silence was shattered with screaming. It was the type of scream a frat boy lets out when a serial killer is in the process of gutting him with a fountain pen. I just about had a cardiac arrest and many of the people around me jumped out of their seats. It was only when the repetitive screaming suddenly tripled in volume that we all discovered the culprit: a cell phone. Some jerk pulled the phone out of his pocket, embarrassed at how loud it was, and accidentally dropped it on the floor.