I'm sorry, but this is the second time I have seen this today, and I just don't think it is as imperative to have your real blood type on your Shoulder Plate as many people are now trying to make it out to be. In Reality the EMTs are never going to give you a transfusion based on what is written on a piece of a costume. We know that what is written on the shoulder plate is supposed to be the Blood Type, but frankly the vast majority of the general public, which will include Doctors, EMTs, Medics, and Nurses, are probably not even going to know that the shoulder plate is supposed to be a blood type. For all they know its your initials, or maybe you're on the "A Team." Even more so, in a real emergency the medical response team is going to be pretty much ripping you out of your costume as fast as possible to get access to you for treatment so they won't even take the time to read the details on your shoulder plate.