Whether they be written, whether they be verbal-it's alway wise to follow the directions.
Example: Handwash, not dishwasher safe
(and I'm sorry there's not photo for you with this one)
Dishwasher & microwave safe, will get hot in microwave, made in China.
(but they forgot to add-if it gets too hot in microwave, it will explode and you won't get to eat your leftover chicken enchilladas and that will be sad.)