Just had an Ekko intentionally feed, afk, and flames cause I (The jungler) took blue buff.
Don't be like this Ekko. I was Xin, he was fed yes and I was pulling my weight. He was taking blue and I was right there and was going to let him however I checked his stats. He had 3 Mana items and was already at full CDR.
I had zero mana items and only at 20% CDR. The buff would do literally nothing for him and everything for me.
Don't flame cause of stuff like this, look at it in perspective. If something isn't actually going to help you get stronger but it will help your team mate.. leave it for them!
The same can be said for Nasus/Veigar stacks when you're trying to turtle and they're free farming stacks at on turret while you hold another turret off of the enemy. Let them stack! It'll potentially mean the difference in a win vs. a loss.