@Draugnar: "@Jamie - they are not equal in that forging a document is far more difficult than losing one. Especially as the only documents we currently have are wallet cards for the opt-in. Wallets get separated easily enough from the victim in an accident and if the opt-out were a wallet card as well, then an unintentional abuse could still occur."
I'm not sure about the USA, but here in the UK, if you are a donor your details are held on a database to which the hospital can refer - so you don't need to actually locate the person's donor card in order to take their organs. The fact that their name is on the database is sufficient authority.
@Draugnar: "My body is mine even after I die. That is why the last will and testament is taken as sacrosanct and if someone specifies that they want to be disposed of in a certain way, we are obligated to do that."
Actually there are numerous circumstances in which the instructions given in someone's will may be ignored or over-ruled. Here is an example which I have nicked from wikipedia:
QUOTE: "In the United States, many states have probate statutes which permit the surviving spouse of the decedent to choose to receive a particular share of deceased spouse's estate in lieu of receiving the specified share left to him or her under the deceased spouse's will. As a simple example, under Iowa law (see Code of Iowa Section 633.238 (2005)), the deceased spouse leaves a will which expressly gifts the marital home to someone other than the surviving spouse. The surviving spouse may elect, contrary to the intent of the will, to live in the home for the remainder of his/her lifetime. This is called a "life estate" and terminates immediately upon the surviving spouse's death.
The historical and social policy purposes of such statutes are to assure that the surviving spouse receives a statutorily set minimum amount of property from the decedent. Historically, these statutes were enacted to prevent the deceased spouse from leaving the survivor destitute, thereby shifting the burden of care to the social welfare system. END QUOTE
@Draugnar: "And one final note on the rights of the dead. You know it is a crime to desicrate a grave or molest a corpse right? If they have no rights, you can't commit a crime against them, yet we have laws declaring actions against a corpse to be serious crimes."
This does not demonstrate that the dead have rights. If I urinate against a lamp post, I may be arrested if a police officer sees me. This does not imply that the lamp post has rights.
It is a crime to desecrate a grave, but this is not because the body in the grave has rights. It is because society as a whole, acting through government, has decided that desecrating graves and having sex with corpses is disgusting and should be legislated against.