J,
I think (a) there's currently no way to actually delete a Groups.io
account once you have one, ...
I believe that is true also. For testing purposes it would sometimes be handy if you could.
... and (b) if she ever wants to regain control over her content,
re-joining under that account would restore that.)
There's the maybe.
It depends on the details of how a subscription works. In Y!Groups I tested this once and discovered that leaving a group and re-joining it would not recover control of content; it was as if the new subscription were treated as a new person. Some years later what I thought was the same test produced the opposite answer. I don't know if Yahoo changed the implementation or if there was a difference between my two tests which I didn't notice.
Long ago, it was common for ISP's to re-issue the same email address once it had been abandoned (the account closed or the bill not paid). So joe@... might not be the same person today as it was months or years earlier. In that circumstance one would not want the content to be reclaimed simply by joining the group again with the old email address. Yahoo Mail (infamously) began re-issuing abandoned email addresses a few years back as well.
(An aside: I hope that Trello suggestion gets implemented in a way that
allows members to keep their accounts under separate emails as separate
accounts if they *want* to, and won't do anything automatically to merge
them.
I certainly agree. I can't imagine how it could be implemented without requiring a very explicit action on your part - such as adding and verifying a second email address while signed in with the first. It is that verification step that proves you're the same you.
Shal
Shal Farley