I think you have the right as a coach to ask the question, but the referee doesn't have to respond. I have seen plenty of respectful and productive conversations result from a question, but I have seen plenty that are not. At the end of the day, blaming the calls or the officials is like blaming the YMCA rink for painting the goal lines too close to the end boards. I mean, yeah, it can affect the game, and the home team has a better idea of what will happen, but both teams are still playing by the same rules.