Basically, I'm wondering where you draw the line between taking a firm stance on something you feel strongly about and bending in order to better fit in to our society. For example, I'm willing to bet most MDC members aren't willing to just formula feed because it is common in our culture. Also, at what point do you feel you are imposing too much on your children?
Here's my personal thoughts. We're vegetarian, but we let H taste meat when out or with others. We don't buy artificially colored foods or HFCS, but I will let her eat treats/birthday cake when out. On one hand, I feel this might send a mixed message and at 5 she doesn't understand the real reasons for our choices, but she also is her own person and as long as I educate her and have limits at home, she'll stay informed and healthy. But when my dad brought over a bunch of freeze pops for her, I did make her "trade" them for the 100% juice variety.
I can see this same issue repeated in various other aspects of life right down to shoes (I don't like H to wear flip-flops which she hates), toys, school, religion, television, sleeping... you name it.