“Home Alone” is a term coined by the late Anthony Cekada, a Sedevacantist priest, who used the term as a pejorative against those who believe it is safer not to go to priests without canonical mission from the Church Hierarchy. Home Alone Catholics are simply those who do not believe there are any Roman Catholic priests with jurisdiction to administer the sacraments, or those who do not know of any to go to for sacraments. It is the reasonable and natural consequence of living during a fifty-plus year interregnum after mass apostasy of the Second Vatican Council. For further reading on the necessity of canonical mission, see this article.