[just another ref]

One problem I see with 3 seconds is that the discussion of the rule has gotten bigger than the rule itself. Some officials seem to have made it a contest. (I only called it once all year. I haven't called it since '01. etc.) Others have elevated their "warning" to the point of almost screaming at the player. (Get out of there, 44!) I personally prefer a literal interpretation buffered by a bit of common sense. I do not call it on the guy standing with one heel on the free throw line. I do call it on the potential rebounder who lurks in and around the lane all night, even if he "almost got out of the lane" that time.
No warning, call it when you see it like anything else. Does this mean that I have repeated 3 second calls that "disrupt the flow of the game," whatever that means? No, quite the contrary, I believe.