From what I know the system is banning these abusers? I remember it being an issue before, not sure if it was addressed. But thank you for reporting us this.
Have you any idea how to ban it? I am understand you frustration, but this game look like a any normal game. I mean, its really hard to make ban automaticly. And even you are make it, this players will still have a ways to circumvent it.
But i am agree about this problem. My thought, you need to incress punishment for this players. 30 years ban maybe...