Who is the guilty party in this situation?
Imagine you're getting ready for a team fight. The entire enemy team is there and you only have three team members. The other two are on their way. The two teammates beside you decide, even though its a 3v5, they're going in. You don't go in, because you're waiting for the other teammates. They then spam all chat, "report so and so because they lost us the game cuz they just standing there, refusing to fight."
So, Riot, who is guilty?