We forgot to get another vaccine shot. On the form, they ask if we want Gardasil. We declined. Then they took our daughter to administer the shots. They brought her back and started to apologize: "We're sorry, we didn't see that you declined, and we gave her the shot anyway." We could've sued them, especially with the adverse effects, but we're coming from a culture that's not overly litigious.
And this is not the first time doctors in leading Southern California medical groups have completely ignored what's on the form! My son was going to have a minor surgery, so they asked me: "Oh, we give an anesthetic before we actually administer the actual one, because some kids are afraid of shots." I told them he's one of those kids and always liked, actually, even watching when they administer the shot, and never cries. This is given he's already on IV! Another doctor came a minute later and started changing the IV. I asked him, "What are you doing?" He said he was administering the pre-anesthetic. And I said that we declined it on the form, but it was too late. Then another doctor came and started to apologize - they don't read, they assume what people want! And this was at CHOC, the most prestigious children's hospital! Of course, as I said, we didn't sue.
So, I know that you should double-check and ask exactly what they are doing. Unfortunately, you can do this only if you're present. And you should always require them to repeat what they plan to do to your kids if they are taking them away from you. And... you should sue, as commercial entities, just like people, learn best when it hurts.