When a player asks if the pitch he swung at was a strike, he's not trying to be a smart aleck, he is looking to improve his idea of the strike zone. They have been asking this question in the majors for a long time now, and occassionaly players ask me "was that a strike?" I will tell them the truth. If I am sure the pitch was a strike I tell them yes, if not, I tell them no. If it was a really close pitch, and they foul it off, I may say something like, "pretty close pitch, good thing I didn't have to call it," and laugh. That usually gets a chuckle out of the hitter, and it's all good.
If anyone else wants to do it their own way, great. It isn't questioning the umpire to ask where a pitch was if it was swung at.
Now try to ask me if a called strike was a strike and see what happens.
