It certainly is common. The rejection of blood is not principled to most people. It is logical to believe that a group that would ban a common, safe, life-saving procedure also is against any medical internvention. JWs are a fringe group. I don't feel they highlight their beliefs in a simple, cohesive form. Regular people are not going to pour over Watchtowers and Awakes. Mormons,seven day adventists, Christian Scientists are all considered fringe groups. I don't know if people are hostile but they are not informed of their beliefs. Why should they unless there is a comp religion course.
Blood was the most heart wrenching of all the JW silly rules. This was before fractions. I remember Ray Franz noting that no database was kept of hemophiliacs to get in touch with them when the teaching changed. God's policy did not change. Most people would have PTSD from the strain of knowing they aided and abetted someone's death needlessly. How is it different from killing someone in an accident? There is no principled distinction between fractions and whole blood. The scripture is insigniciant in my view. It does not go to the core of Jesus' teachings or the narrative of God's special relationship with Israel.
Real humans are denying others a fighting chance at life. Frankly, they painted themselves into a corner with the blood. It is one thing to die for Christ. Is the blood doctrine worth lives? What religion preaches this? It is probably the point on which most normal people will absolutely reject the Witnesses. I grew up surrounded by former Bethelites. They don't have special anything. Is blood refusal a doctrine or a means of exerting cult control.