I had the same problem with regards the "Lord's Prayer", when I was a kid.
Having been instructed that it was improper to say repetitious prayers, I was castigated by my school friends (religious or otherwise). The teachers couldn't understand it, either.
I believe that it is a little easier in Britain, now.
My heart really goes out to the American kids, though. It's hard enough growing up without feeling "especially" self-conscious.
LT