The offence
After shitmouthing my clan for reasons unknown, this fellow had teamwounded me (seemingly unintentionally) with his wreckless long sword autism.
I decided to [M] him simply because I don't like what he had said in chat as well as his inability to aim his swings. After reporting him [2/5], he then decided that the wisest course of action would be to teamkill me with no enemies around whilst I stood still on the opposing team's flag.
The shit talking in chat was completely unprovoked and the team kill was undoubtedly intentional.
The proof.