Gobledigook, I suffer from all of the "fears" they were discussing on the programme. We had another discussion about it last night and my opinion still hasn't changed. You do read stories about people declared dead who then wake up, and however irrational it is I also feel that the doctors would be less likely to fight for you if they knew they could take your organs.
DH has always said he would donate. I very much doubt he has a card but I wouldn't refuse his organs if it came to it because I know that's what he wants. With the children though, I'm really not sure. DS2 said after watching the programme last night that there was no way he would sign a card.
I would be very unhappy about an opt out system and would be more likely to make a point of opting out in principle if it came in. I also don't agree with the assumption that the vast majority of people who haven't registered are apathetic. How do they know that is the case? There were certainly enough people interviewed who said no.
(No offence intended Misdee to your situation)