I really don't enjoy it when a coach asks the plate umpire, "Where was that one?" or "Where did you have that?" or anything having to do with where the location of the previous pitch was. Whether the coach is aware of it or not (and...they are) the message they are sending is that they think the plate umpire missed a strike. I also find this more common the younger the players are. I simply do not see this at the Varsity level and above in my market.
This summer at Cooperstown, we were discussing this around the campfire one night and someone simply said, "Stop...stop doing that, brother." I said, "What? Excuse me? Stop doing what?" He continued, "Stop telling them where you had the pitch..." and I looked around at our other brothers there and I followed up with, "Ok, so...what do/should we say when we asked where we had that pitch?" And without hesitating he simply smiled and said, "Tell them, 'Coach, I have a ball.' Eventually, they will figure it out and stop asking you. If they continue asking you, you tell them, 'Coach, we're not doing this.' and then issue them a ball/strike warning."
Well, brothers that was several months ago and I have returned to my market and have rolled out this mechanic with great success. I typically have the above exchange once in the first inning with each team and then...I don't hear anything about it for the rest of the game.
~Dawg