So we can say that it’s not the act of baptism that confers the indelible mark on one’s soul, since one can have a Christian baptism and not be Catholic. So then we’d normally think that if a confession or conversion can add this mark to one’s soul, then it is any outward desire to be Catholic that adds that mark to one’s soul – except that the mark is said to be added during an infant baptism as well, when no such desire is possible. In short, a soul is marked when one desires to be Catholic or one’s parent/guardian desires us to be Catholic.
I am always skeptical of any organization that alone claims its necessity.
As far as why one might not wish to be called a Catholic when one has either moved away from the faith or were too young to make that choice when that label was placed on them, I want to show this article about the Catholic Church warning people about Mormon baptism for the dead:
Vatican issues an order to Bishops to not allow Parish records to be given to genealogical societies of the Mormon Church. WASHINGTON (CNS) - In an effort to block posthumous rebaptisms by the ...
www.catholic.org
It starts off where the Church has taken steps to prevent certain information about its congregants from reaching that of the LDS. Now it should be pointed out that the article isn’t saying that a baptism for the dead of a Catholic will harm their souls or affect their Catholic baptism, but they are very strongly against having those practices be performed by people who did not wish to consider themselves LDS. One quote about what the letter to the bishops was to accomplish: “The congregation requests that the conference notifies each diocesan bishop in order to ensure that such a detrimental practice is not permitted in his territory, due to the confidentiality of the faithful and so as not to cooperate with the erroneous practices of the Church of Jesus Christ of Latter-day Saints.”
Another quote from the article, “Jewish leaders have called the practice arrogant and said it is disrespectful to the dead…” Clearly people do not like being claimed to have a faith they do not possess.
One final note, it’s interesting that when a Catholic media outlet talks about the issue with the percentage of Catholics attending mass they will use poll numbers that consider the number of
self-identified Catholics. When it comes to tallying the number of Catholics, instead of using poll numbers to get a close-to-accurate number of self-identified Catholics they’ll use the Chruch’s statistical yearbook. Rarely in those cases will they make mention of the tallying process (counting those as Catholic those who are not Catholic by any normal standard). In short, the number of self-identified Catholics is needed only to soften the blow of the small percentage attending mass, but the more inflated number is fine when boasting of the number in the faith.