Causing people to be uncomfortable and fearful is bad.
It is Halloween and Oliver has been invited to a friend's costume party.
Oliver wants to wear a good costume.
Oliver dresses up like a ninja by wearing all black and only covering part of his face.
Oliver dresses up as a ninja and covers his face and brings real knives to the party.
Everyone likes Oliver's costume and Oliver has a good time.
Everyone is scared and Oliver's friends ask him to leave.