Well, I don't think you are stupid. You have your belief system and make decisions based on it, that is your right. I respect that. You don't try and shove your beliefs down my throat, and I respect that, too. I am not a JW or a particularly religious person, but I do think that the 10 commandments are for the most part good rules to live by, religious or not. I also strongly support an individuals right to choose, as long as it does not impede my rights to make my choices, which may or may not be different from yours.
As for blood transfusions - I would personally not want one, unless absolutely necessary, i.e. trauma with rapid blood loss. This is not based on a religious belief, it is based more on percieved short and long term risk. For example, prior to the HIV virus being discovered in the 1980's, blood was not routinely screened for HIV, because you can't screen for something unless you know what you are looking for. However, the virus obviously existed prior to being identified. The first tissue sample known to contain the virus was taken in Congo in 1959. The first known sample from the US, came from a 15 year old male in St. Louis who died in 1969. So, who knows what else may be lurking out there in the blood supply that has not been identified yet. The odds of catching some unidentified disease from a blood transfusion is probably about the same as hitting the lottery, but why take a chance if not necessary. If I ever needed major surgery, I would rather deposit a few pints of my own blood ahead of time if possible, just in case.
Thinking about this brings up a question for Scott: What is the JW opinion on receiving transfusions from yourself, i.e using your own blood donated prior to surgery? Or a child receiving blood from a parent if the parents blood is compatible? I am just curious, no attack on your belief system intended.