Defects!
In almost 8 years I've not once been questioned for writing up a defect, ever. Simply put there have been no adverse ramifications.
I have had a number of interesting discussions on the subject though, and have always advocated my view that the company would be most unpleased if one did not write up a defect, and the Co subsequently received an NCN or similar.
My view is that the feeling of a set against writing up defects has come up from GA, when is doesn't exist.