I think that attempting to prop kill, like throwing barrels at people, should be a KOSable offense. In my previous round, someone prop killed another person with a barrel then proceeded to throw more, one almost hitting me. Then I, thinking he was trying to kill me, killed him. Everyone else therefore proceeded to kill me because someone else was trying to kill me.
Prop killing is worse on dust, or atleast that is what it seems. And If someone throws a barrel near you I would count it as t baiting.
+1. I already use this reason to kill people. I figure if the prop is thrown hard enough to kill me and it flies near me, I will kill them.