Not calling "Foul ball"

I'm a slow-pitch guy. I call foul ball on EVERYTHING because EVERYONE runs on EVERY hit.

I had a older umpire who does fast-pitch working with me in the open league (the big B and C boys who hit homeruns as if they were singles) tell me anything that goes out of play doesn't need to be verbalized. I said, if I don't verbalize, and Big John there goes flying from 1st to 3rd and is standing on 3rd and sees me telling him to go back to 1st, I hope YOU'RE ready to explain to him why I didn't verbalize it. He said if Big John has a problem with a little thing like that, he won't be finishing the game. I had to ask, how many open league games have you worked? He said this was his first night, since they needed help and the fast-pitch games were covered. My face was blank, but my mind said "good luck".

I know you all are going to razz me over what I just said, but I just had to vent it.