Considering organ Donation (after death)

I'm considering becoming an organ donor after my death. Call it paranoia or whatever, but is it possible that doctors might declare me dead prematurely if a high-profile person needed an organ, like a heart or something?

I know this sounds far-fetched, but the fear of being killed unnecessarily is making me second guess this decision given the lawless and brutal nature of our society.

I discussed this with a friend, and he thinks I'm just making excuses to avoid being a donor, but no one is forcing me anyway. I just need some clarification. After death, I won't need my organs anyway, so why not let them be used for something beneficial?