My friends who are in bronze 3-5 do this and I've literally never seen anyone else do it in my usual games lol. What's worse is when you are the carry and they still bitch about KSing. If I'm playing Katarina I'm not going to dick around and let the low health enemy get away just because you think this is CoD, get used to it lol.
I remember getting yelled at by the entire team cause I was playing katarina...Murdering EVERYONE in all the fights and my team was all "oh you need to leave some kills and spread some gold to the rest of us." They then intentionally left me in the middle of a fight while I was like...12/1/1 or something and I simply told them "fine yall think you don't need my help...lets see how you guys do without it"
HOW DID U GET THE PICTURE TO SHOW UP?
LOL ITS TRUE
I always give kills to my allies. Because its easier to let 3 people be fed rather than you getting 17 kills while your team is sitting at 5 or 7 at most.
I like to give my team up to 8 kills before I start taking them.