Block a User? (Kebir Blue)

Some loser keeps messaging me with threats of invasion. The mouth-breather hasn't figured out that I'm in secured mode. He hasn't figured out that he is too, apparently.

How do I block him?

lol.... I dont think you can. If he's really harassing you, maybe you can contact the GMs and ask them to intervene.

You know, this is why we need to remove the war levels from this game as the so called 'loser' can't attack you, we're not seeing any 'petty' player vs player wars anymore and that 'loser' will most likely quit this game altogether now because this and not bother coming back.