I have been shot at by my own team while wearing matching jerseys during a tournament on a small (roughly 100 X 80) speedball field. In fact my teammate almost bunkered me.
Other times my teammates and I used to play "everyman for themselves" during some tournaments. After eliminating the other team one of our back players would call out five seconds we would all take cover and when he yelled go we would shoot at each other.
"In the essentials: unity; in the non-essentials: liberty; in all things: love" - often incorrectly attributed to Augustine or John Wesley - original source in question
"Use peaceful means where they are appropriate; but where they are not appropriate, do not hesitate to resort to more forceful - Thupten Gyatso (the Dalai Lama, 1932)
"It is not the will to win that matters - everyone has that. It's the will to prepare to win that matters" Coach Paul 'Bear' Bryant.
"The ink of scholars is more precious than the blood of martyrs" - Muhammed