[Adam]

I call it every time I see it. He's doing it because he's never been called for it, or rarely anyway.

Now, nothing says a player can't square up and chin the ball as he pivots. I look at whether his elbows move faster than his waist; it's a rule of thumb, as well as his face to guage his intent.

It's a dangerous play and should be called. They downgraded this from a tech so we'd call it more. From the sounds of your situation, calling it the first time would have prevented him from doing it again; and it would have kept the opponents off your back (if I was the coach, I'd have wondered why you weren't calling it.)

One thing I hate, though, when I call it the offender's coach invariably asks me to "get them off of him."