On my flights... I ask the pax to hand me their rubbish as they leave and to cross their seat belts too. Ive found the majority of pax are happy to help after I point out the reasons for asking. I then carry out a full security check of seats, toilet and galley without replacing sick bags, mags or brochures... Ive never experienced problems. My turnarounds are quick and effiecient.
Ask yourself:
1) How many pax are sick during your duty?
2) How many pax ask you for a inflight magazine to read? (When not in their seat pocket)
3) How many pax ask you for a brochure? (Again, when not in their seat pocket?)
Nuff said.