One of the things that I have noticed on some blogs and discussion forums is that a phrase will be taken out of document deemed infallible and used to beat other people over the head with. There is no salvation outside the Church!, for example. I hope and pray that I never become one of those “converts” who bludgeons people with phrases like that! There are ways, sadly, that one can spout even truthful things in a way that pushes people away from that truth.
Others will run with a quote from one of the Vatican II documents as if it stands on its own or abrogates everything else the Church has taught previously.
I am reminded, sadly, of the way Protestants behave when they hurl Bible proof-texts at each other.
Just as I have come to understand that every passage in Scripture has to be interpreted in light of other passages and Tradition, is it not better to interpret various infallible documents in light of each other?