I've been involved in the publication of a volume, as a collaborator. I did all the typesetting, among plenty of other things. After the publication, a few authors asked me to send them a PDF of the final version of their article. I obliged. Some other authors asked the same thing to the scientific editor of the volume, who in turn asked me to send her the requested PDF files.
I then learned from a third party that the authors who have received their article put it online on a well-known academic platform, and that there might be legal issues about this with the publisher. I told the scientific editor about this and asked her whether I should create new files with a publisher notice or something. She answered me to "please tell these researchers to wait a bit before putting their articles online", so that she can examine the issue.
There's no way I'm going to do that. The scientific editor is a well-known researcher, and these authors are well-established professors. I'm a PhD student with zero authority, who got paid for doing the kind of menial/boring work nobody wants to do.
How should I go about this? I'd tempted to just ignore the request and go on with my life, but I'm not sure this is the best way to proceed. I don't want to be in bad terms with the editor of the volume.