Yes, Oliveira got the point. This guy is just simply immatured, but he keeps using bad manners, after some of the players asked him to stop it. We usually call a vote and mute him for a while.
I have the chance to react, so I will close the kindergarten, before it develops to a bigger problem.
@Eagle_cz Thank you for your tips, I will keep my eyes opened next time
Edit: I have just finished my conversation with bobolo. Since I prefer peace instead war, I let him know the situation. As you can see the 1st pic, he is a bit "different" when it comes to thinking about meaning of words. The 2nd one is a bit more interesting; I am really curious about it. He may understood me after the 100th time.