Depends on what you call justice
Yes, I watched it. I was more interested in how they would handle the topic than I was in the latest episode of CSI (which I taped to watch later, anyway).
On the whole, I thought they were very even-handed, and genuinely kind to the "abductees" during that segment (approx 15 mins out of two hours).
So no, they didn't "totally shred" the idea. They presented both sides without demanding that the audience make a choice. They didn't sensationalize (like FOX Network did with the Moon Hoax Conspiracy Nuts), and they didn't ridicule.
They did make repeated use of the word mythology ...