no. you shouldnt be allowed to kill someone for upsetting you. the idea that you should is just completely silly.
"why did you kill him?"
--"...um, well... he... HE PISSED ME OFF!!!"
seriously?
im going to assume most of the people answering yes are young gamers that didnt really think about the answer. yes meaning that theyre going to END A PERSON'S LIFE for a THING. otherwise, the world is becoming a very scary place to live.
"send a message?"
send what message? that if you steal something you need to bring a gun because if you do it unarmed some cowboy will shoot you in the face for a cheap possesion? yay. every robbery will be a shootout now.
I just asked my GF, she also said yes. unbelievable. shes so mousy and meek im sure she couldnt never even think about doing it. but she believes that you should have the right. funny.