I think the phrase was "Flight Safety Is EVERYONE's Business".
I'm sorry for the CC having to deal with 'uninformed' pax, but if you have genuine concerns then SAY SOMETHING. The other [few] hundred people on board will [possibly] buy you a beer if you're right. If not, at least you have made a contribution to FS Awareness.
NEVER let us develop a culture where people are afraid to make a comment. JSL's example with de-icing sums up how important these things can be.