Yesterday, churches were full of “visitors”, many of who are Catholic CEOs (Christmas and Easter Only)…and many received the Blessed Sacrament, without having been to confession in, perhaps years.
Is it wrong? Yes. Is it mortal sin? Perhaps…depends on the prerequisite conditions of mortal sin.
The bigger question is, did someone you know who was not properly disposed to receive the sacrament go forward, without you educating them, and firmly but lovingly explain to them that they need to examine their consciences to determine whether they should receive or not?
Or, did you sit back, happy they joined you at Mass, and unwilling to enter into confrontation during the Christmas season.
Its tough, but its yet another one of those many concerns that don’t just rest on those we are observing, but is our responsibility to act on, also.
Peace and all good!