I would think it's pretty much obvious what you can "abscond" with.
*En Route Magazine & Duty Free Brochure
*Pillow and blanket kit (domestic version)
*J/C Amenity Kits
The noise reduction headsets are not complementary, nor is the "poor excuse of the duvet". If it is so poor - then why take it?
Having said that, I've seen a variety of things being removed from the aircraft.