How much dissent should we allow?

[CecilOne]

I don't believe officials in any sport should use ultimatums like "Another outburst from you and it's a card". A comment like "no more, coach" or "that's enough, #20" is the same message without getting you into an absolute you can't avoid. Also, anything that sounds like a threat will create resentment and we don't need any more of that.