I've never known a Waldorf community that was ostracizing, or even judgmental. Sure, you have those few outlier parents that can be difficult, but the communities as a whole pride themselves on tolerance, patience, acceptance, and respect. (In my experience anyways). At our school, there are super-waldorf families, mainstream families, and everything in between- And all are valued and respected within the community.
I've never heard of anyone casting judgment on things such as soccer playing, reading and numbers, dietary habits, dress, etc.. Again, I can only speak from personal experience, but really- I can't even imagine any parents or teachers raising a fuss about such things. Many of the kids at our school are involved in extracurricular activities, and the children are all over the spectrum as to their style, interests or academics. All of it is honored.
The only thing that I've heard complaints about is some children bringing the 'pop culture' stuff into the school with them- and I agree that it is frustrating when you work so hard to shelter your children from those influences, only to have it come up at school. For example, I was a irritated when a parent played Lady Gaga (The Glee version, so no explicit lyrics, BUT STILL-) in her car during a field trip, which my daughter was riding in. Did not appreciate that. But it's not mainstream families vs. Waldorf families- In other words, I've never perceived such 'class' warfare in our community, even when issues do arise.
Anyways, no need to take away your daughter's beloved books, or refrain from allowing her to play soccer or whatever- No one will blink an eye or think twice, unless they perceive that it is you forcing these on her when she is unwilling or unreceptive, in which case they might express concern but not so much judgment.
Hope this helps :)