Eh, if they post it on the web it's their fault. Not anyone who links to it.
Usually it's illegal to copy pieces of the article and post those pieces for your own use, but it's not at all illegal to link to it.
Heck, google links to it (that's how I found it originally). Nothing illegal about that.
If they want to password protect that page for subscribers only, fine, but they haven't done that.