I have a theory, backed by evidence, that supports the exact opposite. Things like McDonalds and others adding expanding the healthy options in their menus, listing calories/ingredients more visibly, switching from frozen to fresh ground beef in their burgers.
Isn't science (postulating and then proving/disproving theories) fun?!
(Oh, and as an aside: one dude's story about how he personally thinks that a sense memory from 30 years ago is not the same as a more recent sense memory is definitely something to investigate. Real hot lead right there.)