"This ARAM game isn't fun so I'm going to AFK"

Seriously just had this happen in my last game. Our Vladimir thought since the other team had two healers that we would eventually lose anyways, so he decided to tell everyone that he was going to afk. Then later on he decided to intentionally feed and the enemy team took notice easily because he just ran past everyone and let them kill him. Really people? If the game isn't fun don't ruin it for 9 other people. He tried to convince us that the sooner we lose, the sooner we will "have fun" in the next game. We weren't convinced.