Of course, they can hardly prevent lay Catholics publish their opinions in secular media. But which lay theologicians do you know who took a stance against HV and whose carrier has survived that, without recanting?
Fr. Charles Curran is a noted priest theologian who was extremely vocal against HV and was able to survive silencing. While he was forced out of the national Catholic University in the US, he earned tenure at a Protestant institution and is still outspoken in liberal Catholic circles.
http://en.wikipedia.org/wiki/Charles_Curran_(theologian)