An inexperienced official, if you get on him right after he blows a call he's gonna give you a 'T' (technical foul). A confident, experienced official will let you have your say. Then he'll say, 'OK, that's enough.' And he might say, 'Coach, I missed it.' If you rip the inexperienced guy, he's gonna T you. He hasn't built up the positive reputation of being a good official. So he uses the power of the whistle.