I don't know if this has been covered on this thread already (have not read the whole thing) but I cannot picture a person saying I refuse to believe correct doctrine and choose to believe a gang of lies instead. In II Thessalonians we read that people are deceived when they do not love the truth and while that is being applied to those without God, it seems to me that it might also apply to those who say they are believers yet remain in deception.
There are people who have no idea they are deceived (that is how deception works) and they simply follow a preacher or teacher or even a friend but that would make a good case for each person studying and asking questions and not just following blindly as some do.