Let's take a closer look
"There are some things we must never do, as individuals or as a society, because they are always incompatible with love of God and neighbor. These intrinsically evil acts must always be rejected and never supported. A preeminent example is the intentional taking of human life through abortion."
Other intrinsic evils include euthanasia, human cloning, destructive research on human embryos, and homosexual marriage. These beliefs are a part of the Dogma of the Catholic Church. According to the CCC the "Church's Magisterium exercises the authority it holds from Christ to the fullest extent when it defines dogmas, that is, when it proposes, in a form obliging the Christian people to an irrevocable adherence of faith, truths contained in divine Revelation or also when it proposes, in a definitive way, truths having a necessary connection with these". Unlike discipline - a practice that can be changed (think abstaining from meat on all Fridays of the year) - dogma is definitive and can never change.
So what are we to take away from all of this? Since these intrinsic evils are not subject to change, individuals who perpetrate or formally cooperate in them are making a statement to themselves, the Church and society as a whole. In essence they are saying, "we, with full knowledge of our willful disobedience, stand squarely against a dogma of the Church to which we proclaim to belong". While going through the motions of being in full unity with the Church, they publicly fly in the face of her most deeply held teachings.
What Eucharist Says
Eucharist as Perjury
As much as it might appear desirable to see the sanction of those who perpetrate this scandalous perjury, it would be far more beneficial to all concerned to have the desecration of the Eucharist come to an end. These actions may likely give aid to a persistent lack of belief in the True Presence and could lead others astray. What is needed is a renewal of faith - both in understanding and action. Unfortunately faith in the reality that is Eucharist is at an all time low. As members of the Body of Christ, this impacts us all, for as 1 Corinthians tells us, "if one member suffer any thing, all the members suffer with it; or if one member glory, all the members rejoice with it". Let us join in communion with one another for the good of the whole. May God have mercy on us all - sinners that we are!