Meg, there's no need to be fearful of sedeprivationism. No need to be fearful of sedevacantism, either. They are both theories trying to explain, in theological reasons, our present situation. As long as someone or their group is not dogmatic, then I don't see a problem with a theory. In the Church, everything is a theory until She states otherwise. None of these are condemned theories, so there's nothing to be scared of.