Decent? Ned doubts it. With a few, very rare, exceptions, he hasn't met many human beings who he'd classify as decent. Not when they find themselves in a position of power over others.

When Ginsberg says what he suspects about Bob, that changes matters, yes, but not necessarily for the better. If Bob were going to be decent about it he'd never have confronted Ginsberg about the drawings in the first place, would never have threatened to tell everyone, even if he was just looking for confirmation. Ned knows that if he somehow found out that another person had a secret, the way that he'd show his respect would be pretending never to know. That was his way of doing things.

"How do you know that?" he asks, heart sinking further.