There has been a good deal of discussion of posting on social media instead of as LTEs. Here is my most recent FaceBook post.
Establishment of religion
The "Hobby Lobby" decision stated that employers (including corporations) which have a religious objection to contraception may refuse coverage for contraception in the insurance they offer their employees. Specifically in the decision, although it wasn't raised, is the statement that employers with a religious objection to blood transfusions may not refuse that coverage to their employees.
So, if you follow a court-approved religion, you may impose those standards on your employees. If you follow a religion which is not court approved, you may not.