I am unsure. I don't really like the idea of it, but then it seems stupid to object to it because a) I won't need them anymore and cool it would be great to be able to help someone who needs them. But then I don't think that my heart would be able to be donated as I have a heart murmur, and there is also a genetic liver condition present in my family which I don't seem to have yet but it may appear one day so I don't think anyone would want my liver either!
Many people don't realise that your family get to have the final say in whether your organs are donated or not. Even if you are on the organ donor register, your family can overrule this. So it's important that you have this discussion with your families!
My family know my wishes, and I would be ecstatic if every organ/ tissue was used to help others. (But, do want the docs to have a very hard effort to save me first). I have threatened to haunt them otherwise.
It actually annoys me when people are against it, as I'm sure they wouldn't knock back that kidney to save their own life.