It's a pretty clear breach of copyright in fact, "deep-linking" as mentioned in this thread already, particularly as it's being done to avoid a paywall. The chances of any one prozzie suing are probably minimal, but it's up to Admin to decide if that's a risk they really want, and also if they want to set a president that illegal activity of that kind is allowed here.
I've no idea if prozzies would be bothered or not, but I've had some of my work stolen and used elsewhere without my permission. I was not pleased and took appropriate steps, even though it cost me more to do so, as a matter of principal.