I Have to disagree with you, Savannah; challenges are more then a simple tatic.
If I get killed in a challenge, I believe I should not take revenageon that person for my death.
Instead if someone kills me, without challenging, I fill justified in trying to hunt that person, with the help of my friends if they offer it.
Just my two cents :)
Written by my hand on the 27th of Paglost, in the year 981.