[@w-sky Participant 3 years, 11 months ago]

Yes sure, that could help. We had decided once that we want user registrations as quick and easy as possible. Earlier we even allowed anonymous comments but of course, that generated too much spam in forums and comments.
Maybe I will try a captcha on the registrations page. We had Google ReCaptcha once, but can not use it any more because it does not comply with EU-GDPR.

If we could filter all “subscriber” users who have not published any comment or forum post, that would probably list exactly all of those kind of spammers, as well as “dead” users who can be deleted too. I am working on that.