What To Do In Cases Like This

In a game i just played i was flamed all game effecting my gameplay and got flamed even more all game by everyone but 1 person on my team at the end of the game i got an add from one of the players expecting an apolgie i accepted it but he then told me i should kill myself what should i do in this situtation theres a highly unlikely chance he will be banned due to my whole team flaming for no reason and i highly doubt any punishment will be done to the player but when he tells someone to kill themself just because they are having a bad game i really dont know what should be done i dont want to see this guy on the fields of justice and i dont think riot should only accept reports based on in game attitude they should allow you to report someone outside of the end game screen for situtions like this