Stop placing my friends on the other team.
If you place my friends on the other side of my ranked games, I WILL run it down and give them a win. I'm pretty sure in EVERY culture friendly fire is frowned upon heavily. Just because my friends list is full doesnt mean you get to try and force my hand, I will just take the moral high ground and give the win to my friends. If my freinds list is to big, thats for YOU to figure out!
Edit: Stop comparing league to real sports. In real sports, everyone who makes it on my team is actually at my level. In real sports everyone who is on my team isn't some random jack off troll who was the left over in a pick up game. Ranked league is nothing like real sports. In REAL sports, when the enemy scores A point, the ball doesn't magically turn into lead whenever my team handles it.