No it's not.

We should treat other human beings as free thinking autonomous agents, when we lie or present false information we take away from them the opportunity to make decisions for themselves based on reality. That's a theft of liberty, and avoiding that should be valued above and beyond any other perceived benefit.

You can't build a strong foundation on misinformation. And asides from the fundamental ethics of truth, which is enough reason in it's own right, that kind of misinformation has a way of propogating like a virus in ways we couldn't predict - and coming back to bite us in the ass.