I'm for it too. The only con I can see is if someone did not want their organs taken, but through some mix up they got harvested anyway.
I kind of see organ donation like voting or something. I think a lot more people would sign up for it if they knew where to go, how to sign up, or cared about the process itself. A lot of people probably don't care about organ donation simply because they don't know the effect it can have on someone else's life. However, if you REALLY don't want to be an organ donor, for whatever reason, that should be respected.
A line from a related article:
"After all, medical and legal authorities are entitled, without explicit consent, to perform intrusive autopsies on all corpses. If that is permitted, it is not obvious why the removal of organs from the dead, in order to give life to people who would die without them, should always be prohibited."