"Do not bend" doesn't relieve the sender from 
the responsibility of packing properly, though.

Twice I've had cels packed with 1 almost-cel-
sized piece of cardboard, in an envelope.. this 
is not proper cel protection, and both came 
bent.  One can write DO NOT BEND till the cows 
come home LOL - until machines and bins can read 
English, and they carefully place these items 
onto feather beds for protection, this phrase 
doesn't really mean anything.  It's not hard to 
pack cels securely - one can get completely free 
materials from the post office to do this, too.

I hate to have to ask sellers to "pack securely" 
now..especially fellow collectors.. this should 
be common sense and I feel like I am insulting 
them :(