Hi @CH_,
Agreed, I think Google Scholar should respond to 302s by removing the content, but we could definitely do better by returning 404s. As @ctgraham points out, I’ve got a modification nearly completed to do that – see Respond to nonexistent monographs with a 404 · Issue #772 · pkp/pkp-lib · GitHub for details. Watch for a patch there.
Regards,
Alec Smecher
Public Knowledge Project Team