It does depend on how you present it, I guess. A certain patronising "you're not in a position to understand the full picture", while accurate, might not be much better either. On the other hand, this deceit that was perpetrated when I was at school that you can study A-Level Science without needing to study maths alongside is just awful; while not at least acknowledging that more is to come seems a bit off too.
Although in the long run it didn't matter too much, as I know do particle physics exclusively, I remember my first taste of it at school. I was looking forward immensely to the idea. What could be more fun than learning about the building blocks of everything we know in the Universe? But in the end it was essentially learning six names of quark, shoving "anti-" in front of just about everything, and repeating ad nauseam that "strangeness is conserved except in weak interactions", while at the same time providing precisely no understanding of, well, anything. This picture essentially continued until the third/ fourth years of University, which I suppose explains just how much groundwork is needed before you can actually do particle physics properly. All the same, there must be a way to do it better. Since I can well imagine ending up as a teacher, I suppose I will have to think about how to do it better myself.