Welcome to the forum!
Excellent first "thread" about JWs and the use of blood. It is amazing isn't it how they put out these "doctrines" and then give the disclaimer, " But do according to your conscience." Right.
In other words, you make the choice, but be ready for the consequences - DFing. It's sad to think of the many adults and children who have died because of this organizational teaching.
Again welcome and I hope you continue to post in order to help others coming out because they are starting to see the real "light" - the facts about this organization.
Juni
http://www.jehovahs-witness.com/11/136819/1.ashx This is the thread with a lot of excellent comments.