Thank you Sensei for your suggestion. All the sempai and I have told our teacher about the situation and examples. I clearly stated that he is going to hurt some one or he will get hurt. Yet He still says we will "Be harmonious" and be "best friends" on the mat. I came to my Sensei and asked him to deal with the situation but was told "We should talk to him". I think that sensei wanted to avoid the "talk" that I had to have with him. I am not sure why he hasn't done anything except a small slap on the wrist to this guy. I think that why I exploded at the "talk". I think our sensei wants everyone to practice no matter what. We have a small dojo with not a lot of members and they don't want to kick any one out. I honestly don't have any problems with this guy except his etiquette on the mat. I am surprised that he still comes to the dojo after the "talk".