Ever played against a team that used inaudible (hand) signals to let their runners know what to do?
As a base coach on 1st, ever yell to your runner "GO, GO, GO" just to yell "BACK, BACK, BACK" just as she gets two steps past 1st? Draws all the attention to you and 1st base and away from your runner on 3rd?
Perfectly legal and it could score you the game winning run.
But is it ethical enough for you?
There are plenty of tactics that are clearly legal and ok to do; there are plenty that are clearly wrong/against the rules; and there is a big grey area in between. But I think there are some general guidelines as to what is clearly right and clearly wrong. As a coach, you can say/yell anything you want to YOUR players. It is up to the defense to react to what is happening on the field (and most good/experienced defenses won't even hear an opposing base coach). However, when an offensive coach or player intentionally does or says something to impersonate a defensive player in order to confuse another defensive player, that is something that falls in the "clearly wrong" category, and should be rung up for interference.
Hey, I think we all want help our kids win (notice I did not say we all want to win...big difference as to who we are in it for). And I think we will all look for every edge/advantage within the rules. But I keep going back to the fact that these tactics will generally only work with 14U and younger players. At that level, we as coaches are also teachers. What are we trying to teach these kids about sportsmanship?
I also recognize that this stuff happens, and we should be aware it. But you seem to be advocating it....big difference!!