The following comes from a January First Things article by George Weigel:
In all the sixteen documents of the Second Vatican Council, is there any prescription more regularly violated than General Norm 22.3 of the Constitution on the Sacred Liturgy? Which, in case you’ve forgotten, teaches that “no . . . person, not even a priest, may add, remove, or change anything in the liturgy on his own authority.”
If you’re a daily Mass attendant, the odds are that you hear that norm violated a dozen times a week. Sunday Mass people typically hear it violated two or three times a week, at least. Auto-editing or flat-out rewriting the prescribed text of the Mass is virtually epidemic among priests who attended seminary in the late Sixties, Seventies, or early Eighties; it’s less obvious among the younger clergy. But whether indulged by old, middle-aged, or young, it’s obnoxious and it’s an obstacle to prayer.
Such self-discipline on the part of celebrants would also help eliminate the clericalism (and worse) involved when Father Freelance, well, free-lances. For in metaphorically thumbing his nose at the Council’s clear injunction (not to mention the rubrics in the Missal), Father Freelance is de facto asserting his own superiority over the liturgy. And in doing so, he is, whether he intends it or not, downgrading the congregation’s role in offering right worship to the Thrice-Holy God.
It may come as a surprise to Father Freelance, but after more than four decades of priest-celebrants trying to be Johnny Carson, Bob Barker, Alex Trebek, or whomever, this act is getting very old. Father, you’re just not very good at it. Your freelancing is often banal, even silly. Moreover, you demean us by suggesting that we, the congregation, can’t handle the sacral language of the liturgy, and that we have to be jollied into participation. In fact, if you listen carefully, you’ll discover that congregational responses drop off when you invite a response in your terms, not the liturgy’s.