Well I know lots of members of the medical profession, and I can say this is total rubbish, for 3 reasons:
1) Doctors appreciate organ doners. They know very little about you when you are rushed in, but if they know you are a doner they know something good about you.
2) There has been rumours of doctors getting in trouble for doing just what you say, and no-one wants to risk getting in trouble, so they err on the side of caution.
3) Why the heck would a doctor decide to not do an expensive operation? The hospital gets paid when they do expensive operations.
I can honestly say YOU are scaremongering, and in the process possibly risking other people's lives. If you do die, getting the organs as quickly as possible is crucial, so your scaremongering could well kill people, and that makes you a shit. Sorry.