My take on it is somewhat different. As I see it, the FUD being spread states that because there are some situations where SPF isn't a good idea, nobody should use it.

I say we simply don't know enough yet. We need to deploy some of these ideas in the wild before we can say for sure what will happen. I see it as great progress that the same people keep bringing up the same tired old issues, FUD or otherwise, because it means nobody's thought of any new problems to bring up yet.