In these verses alone, a good dozen judgment calls must be made. Paul did the same sort of things. My conclusion is that Christians should become spiritually mature people who make judgments by applying Scriptural principles, not by superficial impressions nor worldly criteria. We must be very careful labeling others, but we must be willing to do so when things are obvious, blatant, and clear. Such labeling should not be based upon emotional vibrations, but upon behavior, objectivity, and Scriptural truth.
Gullibility is for squares.