Negatory. I tend to like to keep my own blood within myself plus I absolutely *hate* needles. Yes, it's probably considered selfish or something, but I help folks in others ways. General kindness and respect is something I strive for, but blood donating is something I just can't do.
Plus, while I am old enough, I'm probably either right there at the minimum weight requirement or just below it. I wouldn't quite know that for sure, however, since I've never bothered checking. I do know that I weigh not all that much.