Are there involuntary Catholics? I was just reading this answer which stated that a person could be Catholic without having gone through confirmation:

Catholics recommend that this is done to infants. 1

If that is the case, that a Catholic baptism alone makes a person a Catholic, and if they are generally baptized as such as infants, it would stand to reason that there would be many people who may be technically considered Catholic by no choice or even memory of their own. Is that actually the case?

So, if a person were baptized Catholic as an infant, for instance, perhaps lost his parents or was adopted, and then later grew up not knowing this, if this fact were somehow brought to his attention and those of the Catholic assembly, would they be considered Catholic, up to such point that the person intentionally renounced this?

As a follow up question, if this is actually the case, are there some people who the Catholic Church believes to somehow have a better standing with God, from childhood, through no thought or action of their own? If it's not up to the child, and if it does bestow some favor, then would there be any reason not to try to force every child into this if the opportunity arises? If not, is it withheld to punish the child for the sake of the parents' choices?

Citation:


http://www.scborromeo.org/ccc/para/1250.htm
Those who baptize infants are bound by Canon Law to raise those children Catholic. A Catholic parent must


  Can. 1125 1/…do all in his or her power so that all offspring are baptized and brought up in the Catholic Church.


Thus, unless the Catholic parents utterly fail in their duty, it is nearly impossible for a child to be baptized Catholic and not realize once the child reaches the age of reason.

Secretly baptizing foster children, for example, is prohibited by the Church for the reason that it cannot be assured that the child will be brought up in the Catholic religion.


  Can.  868 §1. For an infant to be baptized licitly [i.e., lawfully]…2/ there must be a founded hope that the infant will be brought up in the Catholic religion; if such hope is altogether lacking, the baptism is to be delayed according to the prescripts of particular law after the parents have been advised about the reason.


Thus, to answer your questions:


  a Catholic baptism alone makes a person a Catholic


This isn't quite correct. Catholic baptism + raising the infant Catholic makes the infant Catholic. If the infant is baptized Catholic but not raised Catholic, how is this any different from if the infant were baptized outside the Catholic Church? Anyone, inside or outside the Church, who can apply water and say the baptismal formula can validly baptize.

Catholic teaching is not that baptism alone makes one a member of the Church. As Pope Pius XII's encyclical Mystici Corporis Christi said,


  
  Actually only those are to be included as members of the Church who have been baptized and profess the true faith, and who have not been so unfortunate as to separate themselves from the unity of the Body, or been excluded by legitimate authority for grave faults committed.
  


Baptism and profession of the Catholic Faith are both required to be members of the Church. Since infants lack the use of reason, the Catholic environment in which the infant is brought up substitutes for the inability of the infant to profess the Faith. After the infant grows up and attains the age of reason, he can formally make this act of faith in the sacrament of Confirmation.