Dont play with peoples' lives
I really think that being a crew member, its your duty to report such incidents as it can be detrimental to yours and your passengers' lives.
I guess just because its a daily thing for crew members, complacancy sets in. This is dangerous.
If you look at the Helios crash, it was something to do with the A/c and pressure control.
I was once on a Air Sahara flight from Singapore to New Delhi when during landing, i noticed that one flap of the starboard speed break did not close properply. I informed a crew member who was very grateful for the said info.
Its these little reports that can safe huge destruction.
Try to be more responsible...and report such incidents.