Bear with me...I'm just wondering...if it truly is the receiving of the body and blood of Christ that imparts eternal life, then why couldn't a non-Catholic participate? Don't Catholics desire that all people attain salvation? If the bread and wine ("properly" confected) are the literal flesh and blood of Christ, then it shouldn't matter whether or not one believes they are or represent them, should it? Where does Scripture tell us that everyone must first belong to a church in order to receive Christ?
After all, it is faith IN Jesus Christ that places us into the BODY of Christ, His bride, His called-out ones.
In that case was Judas saved? He participated in the Last Supper.
The answer is basically the same whether one believes in the metaphysical Cath perversion or the Scriptural metaphorical understanding, which is that to take part in the Lord's supper unworthily would be to incur damnation.
But Scripturally, as seen in 1 Cor. 11:29 it was to hypocritically take part in this commemoration of the Lord's unselfish death by which He purchased the church with His own sinless shed blood, and which they believers were thus supposed to be showing.
But which they were not doing by treating others as non-members, and selfishly filling their belly, which effect was to "shame them that have not," (1 Cor. 11:21,22) and thus Paul stated, "When ye come together therefore into one place, this is not to eat the Lord's supper." (1 Corinthians 11:20)
Which means that is not coming together into one place to eat the Lord's supper if they are not doing so in order to show the Lord's death for them by charitable sharing of food and communion with Christ and others. To be impenitently walking contrary to fellowship with Christ in any way would also be to incur chastisement, or damnation as with a case as Judas. "We are thus to told let a man examine himself, and so let him eat of that bread, and drink of that cup...And if any man hunger, let him eat at home; that ye come not together unto condemnation. (1 Corinthians 11:28,34)
Likewise in the previous chapter to take part in the dedicatory feasts of pagans would be to have fellowship with demons, not because they were physically consuming the "real" flesh of demons but because of the union it symbolized.
For the Catholic the reason why a non-Catholic are not to participate is not only because they may be morally unfit, but because they do not believe in the Catholic (evidently this was originally a term for the Anglican understanding) "Real Presence," and thus as the article says, "Distributing Holy Communion to people who do not share the Catholic Faith and have not previously confessed their sins profanes the Holy Species, leads the participants to condemnation, and promotes superstition."
As if the metaphysical "real" Eucharistic body of the crucified christ under the appearance of nonexistent bread (while persons with celiac disease suffer adverse effects to the non-existent gluten) and wine (which one could get drunk on in sufficient quantity) until decay takes place (as with mold, digestion, etc.) is not superstition.