Yes but I am not a nut, here is why we did it.
We had a foster child and kept his shots up to date.
When adopted, all his medical records were sealed and under his old name
The next year the state would not allow him to start school without the records
His doctor (who had given him the shots and knew he was up to date said we should not just give him a second set)
so we signed the exemption to get him back in school
he was never out of date but on paper he was