I personally do not believe in demonic attack. I think that The Master imprisoned Satan and all the fallen angels when he was on earth. Frankly, since one of the roles that the WTBTS plays in the lives of its followers is in loco parentis, I strongly feel that all the JW demon hocus pocus serves no other purpose than as the "boogey man" they used to scare their boneheaded "children." JWs are, after all, only a religious cult based on control and fear.
Even if there were demons lurking about, what meaning would the synthetic name "Jehovah" have to them? Zip.
Finally, Jehovah, being nothing more than the concept of God held by an illiterate, savage Bronze Age Levantine semitic tribe, I don't think that demons regarded the Jehovah concept as being anything to fear even when they were free to roam about and cause people to do strange things.
The whole issue is one big nyuck, nyuck, nyuck to me.
francois