I didn't see a problem with BU taking a few steps to the coach as the coach came. If the coach is really hot, I'll make him come all the way. But sometimes, a few steps can be some positive body language that tells the coach, "okay, I'll talk and listen to you". Sometimes, that's all a coach needs. Coaches think umpires are arrogant. If we can get away from that notion by letting him know you will listen, he is much less likely to do something that will get him EJ'd.
Now, once he did whatever he did to get EJ'd, I'm not sure I would have been that loud about it. I would have turned my back to him, given the left hand, and then turned back around to face him.
Why walk away? Are you scared of him?
I've actually tossed, and then had a coach calm down because I explained to him where he went wrong before my partner eventually moved in. He has alot of respect for me because of it, and realized that it wasn't me that tossed him, it was himself
Just some philosophies I've worked in that prevail on the basketball side of things.