Rev.Ref63 wroteWhat would you consider as "extreme behavior?" How would you deal with it?
Following an opponent around the court closely and staying right in his face. 😀
Seriously:
One player coming up being an opponent and yelling, "Look out!"
Similar to the hand near the eyes rule, I wouldn't find it acceptable for a player to attempt to scream directly into an opponent's ear.
Both of these situations deal with physical health and safety.
I would charge a unsporting foul to the player.