You could argue that by sharing a link you are quoting verboten. After all that is likely the intention of sharing the link unless other wise qualified. If the

You could argue that by sharing a link you are quoting verboten. After all that is likely the intention of sharing the link unless other wise qualified. If the individual in question shared the link with a disparaging comment then they would have most likely been fine. I'm not necessarily defending the use of defamation law here just commenting on how it might analysed in law. IANAL :)