[Doctor Stochastic]

Self-donation has been around for a while. I know several people who used it. It hasn't been shown that one has a better survival rate when using one's own blood. (I would think so, but the statistics just aren't ther.) Also, this procedure only applies to elective surgery. Blood has a short shelf life. The good news is the blood by products (plasma, and a few others) are generally safer than whole blood.

[Conservababe]

Yes, but we are talking about blood donors with diseases that can be transmitted. I would rather self donate or have someone I know donate to me. Of course, that would not be possible in an emergency situation.