Korean Gary Mode server terrorist

Hello.
I am Korean Gary mode user.
I do not know what the other country is like, but there is a server terrorist in Korea called "mugwageumhyeonjilleo".
I need to be careful with him.
He is a professional sandbox server terrorist.
What do you think?

dox him, send anthrax to him
or ddos him
or kill him
or just scare him in a physical way, im sure he will stop.