Real sacrilege is the irreverent treatment of sacred things as distinguished from places and persons. This can happen first of all by the administration or reception of the sacraments (or in the case of the Holy Eucharist by celebration) in the state of mortal sin, as also by advertently doing any of those things invalidly. Indeed deliberate and notable irreverence towards the Holy Eucharist is reputed the worst of all sacrileges. Source
Punishments for Sacrilegious Communion:
2. Other assorted evils......
Punishments reserved for Priests who encourage Sacrilegious Communions:
"Give not that which is holy to dogs; neither cast ye your pearls before swine, lest perhaps they trample them under their feet, and turning upon you, they tear you." Mt.7:6