At the risk of shifting the topic, how do your parishes address administering communion to non-Catholics? An example: family members of one of our parishioners visited this weekend. We know they are not Catholic (small parish) and yet they came up for communion.
They partook of His Sacred Body and Blood. For myself it was painful to see. Our general protocol is to not make a fuss and that our priest will address anything he sees. I have often been challenged there to impress upon our people the Real Presence.
In another example we recently had to put our sacristans through (re)training on the proper handling of the sacred vessels and the Blessed Sacrament as we found moldy consecrated hosts (!!!) in one of the tabernacles. It has all been very disconcerting to me, but I see it as a blessed opportunity to help folks grow in their knowledge and love of the Lord in the Blessed Sacrament.
One parish I attended had little printed pamphlet-type cards in every pew that explained the practice of communion in the Catholic Church for non-Catholics in a very polite, clear and simple way. The cards basically indicated that if you are not a baptized Catholic, you are welcome to come up during communion with your hands crossed over your chest to receive a blessing, or you could remain seated, as no one will judge you. This was a rather large parish, and I guess they had a lot of visitors during weddings and funerals that were not necessarily Catholic. I thought it was a very diplomatic way to indicate to someone who was not Catholic what to do when time came to receive communion.