On the Kindle Touch that could result in adding highlighting, LOL!
Betsy
LOL
But seriously, I've found that a trend from grade school has followed me throughout my life: I HATED to write & present & listen to book reports!
I highlight for myself personally (started doing this BIG TIME in law school) but I usually don't enjoy hearing the "why" that other people found parts of books enjoyable , particularly complete strangers (not even from very very close friends who love a book as much as I do).
So public highlighting was definitely NOT FOR ME

When I upgraded from my original Kindle to a Kindle Keyboard (3rd generation), I had already heard about turning off public highlighting. The first time I encountered that, the first thing I did was get into the settings and turn that sucker off.