In OJS 2.x, user account emails must be unique, and the email is validated to ensure that it’s a correct format. We don’t currently enforce unique ORCiDs, but I don’t think that’s a problem you’re seeing, correct?
If you see a lot of apparently random or similar registrations, you may be seeing automated registrations from spam bots etc. I would suggest enabling RECAPTCHA if that is the case; see your config.inc.php for details.
Public Knowledge Project Team
I am not programmer, so I do not dare to do any modification without
instruction. We leave it then. I hope it will be implemented in OJS 3, May
be a ORCID Plugin can adjust the whole journal based on every users unique