Can we please get an option for banning people for lying?

So, I was just playing a game of Solo Queue Ranked, and this Nautilus is playing as support. He flames me throughout the match, but I don't really do anything impulsive, and shrug it off. He's calling me useless and stuff, but in the after-game lobby, he just says out of nowhere, "Lucian is so mean, report him for toxic." I'm kind of surprised by this, and I ask him if there's any proof, and then he goes on this tangent about stuff like, "You don't want me to show proof" and stuff, and I said that doesn't prove anything. After repeating the request to report me, he leaves, and the opposing Jarvan IV is just like, "Lmao". So now I'm probably getting reported for nothing. Great.
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