I disagree both with the warning and demotion. Especially since we don't know in which aspect was he death-evading, maybe he was trolling.
Maybe he was trolling, but the fact that he was banned not once, not twice, but
three times makes it seem like it wasn't trolling, especially since at least one of those bans is the direct result of the person he was in combat with reporting him. We'll see what he has to say.
And the ban was punishment enough imo.
If bans from a server for rulebreaking are punishment enough, then I suppose there's no reason to kick someone in our clan who was using a trainer in combat since they'd be banned from the server.