Where exactly did you state that you were referring to "comparatively reverent" NO Masses?
Post #27, page 2.
Obviously St. Pius X never [e]nvisioned the current state of affairs.
Maybe not--but he, St. Paul, and St. Thomas Aquinas have given us the principles we need in the current state of affairs. Evil must not be done that good may come [Romans 3:8, quoted in S.T. II-II, Q. 64, Art. 5, reply obj. 3]; no one should participate in any sin for any purpose, including the purpose of receiving Holy Communion. But a person who can receive daily Communion without
sinning should do it--because, among other reasons, it's very helpful in avoiding sin.
We are currently living in the midst of a crisis where sacrileges abound in NO Masses. In fact I'd argue they exist in a vast majority of NO parishes in the US.
Name one or two of the most common ones, and explain how you think Catholics are unavoidably guilty of the sin of sacrilege (or any other sin) when they attend these Masses and receive Communion at them--if you really think so.
Where then do you draw the line?
You draw it between sinning
and not sinning,
keeping in mind that you don't participate in other people's wrong or defective actions merely by observing them.
If the priest is dressed as a clown, do you follow St. Pius X's admonition for frequent communion? What if that is the only Mass for you to attend during the week or on a given Sunday? If not, why not? You would still be receiving the body and blood of our lord (if the clown priest used the correct matter, form, and intent), right?
That's a very interesting theoretical question, though one of very little practical importance. If you'd really like to discuss it ... keeping in mind the canonical requirement that priests must wear the prescribed sacred vestments, not clown suits [1983 Code of Canon Law, Canon 929] ... what would you
say? What sin would a Catholic commit by doing so? (That's not a rhetorical question; rather, it's one to be answered on the basis of faith, reason, and authoritative Catholic teaching.)