Bad
absurd - (of an idea or suggestion) wildly unreasonable, illogical, or inappropriate

When Edwin Hubble in 1929 suggested that some of the little dots of light in the sky were other galaxies, many people though the idea was absurd, but he was proven to be correct.
Expendable - Not essential, able to be used up or sacrificed without significant loss, easily replaced or not necessary for long-term use.

The workers didn't feel any sense of job security, and they felt expendable, because they were fired whenever the demand for the factory work slowed down.