Security for the Blessed Sacrament has always been a prime concern, given the basis of this penal perscription from 1938:
[131.] Apart from the prescriptions of canon 934 § 1, it is forbidden to reserve the Blessed Sacrament in a place that is not subject in a secure way to the authority of the diocesan Bishop, or where there is a danger of profanation. Where such is the case, the diocesan Bishop should immediately revoke any permission for reservation of the Eucharist that may already have been granted. [Nullo unquam (1938) 10d]
The Sacrament is not to be reserved in homes, or even rectories. It is not to kept on one’s person for any period of time longer than it takes to arrive at the home of the sick person, or where they are being treated or cared for:
[132.] No one may carry the Most Holy Eucharist to his or her home, or to any other place contrary to the norm of law. It should also be borne in mind that removing or retaining the consecrated species for a sacrilegious purpose or casting them away are graviora delicta, the absolution of which is reserved to the Congregation for the Doctrine of the Faith. [Cf. Sacramentorum sanctitatis tutela (2001); CDF, Ep. ad totius Catholicae Ecclesiae Episcopos aliosque Ordinarios et Hierarchas quorum interest: de delictis gravioribus eidem Congregationi pro Doctrina Fidei reservatis: AAS 93 (2001) p. 786.]
I have known of instances in some parishes where a few persons were in the habit of retrieving the Sacrament at a convenient time, then going to the sick at their leisure. That sort of practice is really unnecessary, not to mention disrespectful.