It does suck for the artists he collaborated with and for readers in general. That guy was prolific during the era I was first reading comics and some characters I really love like John Stewart and Wonder Man had a bulk of their solo stuff written by him. And it definitely gives me a bit of an icky feeling reading that stuff now.
I'm always of two minds about this stuff, I guess. It feels hypocritical in a way for me to feel that way about Jones, but still enjoy the works of Edgar Allan Poe and David Bowie. Half my heroes growing up were rock stars and punkers that did some pretty awful stuff. I also, in general, think people are complex and flawed, but capable of change, so I try to view these things without too harsh of judgement. I don't know them, why they are the way they are, or what's in their heart. It's just sad and messed up.
I don't know. It's a complex issue and I'm always conflicted about where I stand on the whole "separating the art from the artist" thing.