There was an organization that did Christian family life seminars about twenty years ago. The name Goddard comes to mind, but I can't track it down. Doesn't matter.
I wasn't too impressed with the materials myself, but we had friends who went to several weekend retreats. There was one chapter or session on "Standing Alone," designed for teens and younger, to teach them how to resist peer pressure. Coming out of an evangelical perspective, the ready examples were sex and drugs, but I recall that moments of standing firm for honesty, or not participating in the occult, and being kind to an outcast were all part of it. I thought it was generally a good idea, but worried at the time that there was something of insisting on Christian separateness for its own sake in it.
We had already encountered people who were a bit much in this regard. A local Christian school had its February Vacation a week earlier than the district public schools, which was a cause of some inconvenience. Some families had a child in both systems, or one parent worked in the public schools, either of which screwed up family vacations. When it was suggested that the Christian school rethink this, the Scriptural excuse was given: Be ye not conformed to the world...
It's just head-pounding, really.
But I am coming around on that POV. We are social beings and try to blend in to our cultural environment. Often, we blend too much. Most of us are in greater danger of being a squish who doesn't stand up when we should than of being one of those crank contrarians who revels in being a loner who sticks it in the eye of all the others. Even the contrarians of often those who identify with some other group, not true loners.
Having to stand alone for even a fairly arbitrary reason might be a good experience for a child. It is painful, but there will come a few times in your life when it is necessary. Standing alone for your parents' reasons has an extra level of difficulty, as the child might merely resent it and be all the more determined to fit in with the larger culture. But waiting until their ideas are entirely their own may be very late to teach the lesson.