Join Date: Jul 2003
Location: CGK
Programs: SQ TPP30, CX DM, DL P, FB P, AA G, GA CB, WOH LGLOB, HH D, MB G, Hertz P
Posts: 2,887
It has been practiced most of the time IME. They usually collect them after you are done with your second meal.
Sometimes they 'sneak' up to your seat to pick it up when you are in the lavatory around 1 hour before arrival, which I think is a bad idea.