I experienced this first-hand. Parents went through bankruptcy after my father committed credit card fraud. Both parents actually talked about money less during the period right before and after the bankruptcy.

I think the idea was that they were ashamed and did not want to worry me. But it ended up much worse as far as its negative affect on me, because the bankruptcy led to a jarring change in lifestyle for us and breeds distrust between the child-parent relationship.

If/when I'm a parent, I will be much more transparent with my kids about how the family finances work, so they can learn how to manage money responsibly.