I don’t know what you heard, but I think that the connotation is that it depends on where the bandana sits on the head. A lot of the younger women do not pay enough attention and it slips down and exposes hair above the forehead and unless they are very careful, behind the ears the hair can also be exposed. I don’t think that there is a concept that someone who covers their hair with a shaitel is more shtark than someone who wears a different type of hair covering, but it depends on how careful the person who wears it is. A shaitel does have the advantage of covering places completely, like behind the ears, etc., so there are no concerns about that area. I think that if some women realized how much of their hair was showing when they wear various head coverings, they might regret going around with so much showing. I know I would.