Likely so, but best to not simply ignore it, but rather for them to be dealt with in a proper manner. Part of what allowed the festering rot to occur was inaction on the part of those who do good. Also, correction of fraternal error may, in this case, not only save others from error which might lead to service of the Enemy, but also to saving the souls of those treading this misbegotten path now. In short, whether or not they are slowly dying out, action to correct can save souls, and must be done.