1. Mostly it's fake profiles, I see it in the name of the account style "emanuelmacron" and ip.
2. a.Yes the special panel is a good idea, it can be effective only in the immediate. Once the member disconnected, why would an account that did not create a profile within 3 days, come back to create it a week later? That never happens that's why this suggestion.
2. b. To work as you expected, it would take at least a reminder email style "You have created an account, but you have not yet created a profile ..." but my opinion is that if the member does not did not do it right away, he will never do it.
3. You can use automatic account creation here on una.io because you can settle for profiles that do not say anything about their owner and that you never visit. At home, such profiles = death assured of my site.
I ask you to automatically delete these many accounts, and somehow you answer me, there is no need it never happens.
Me in practice, I see that though.
So, maybe you could tell me a cleaning script that I could run by cron?