See my Stack Exchange accounts tab here
Ethereum, Martial Arts Stack Exchange, and Stack Overflow are listed.
I don't know why these accounts are shown on the page (see image) above.
Moreover, not only can I see the profiles of these accounts, but I can also edit these user profiles (and delete their accounts).
I have double-checked the email addresses of these users and I can see that their email accounts aren't the same as my account, user1176409.
(See their email addresses to double check my email accounts haven't been used by others, not for bad purposes.)
What should I do about these accounts? Should I ignore them?
These users (I mean the accounts that is not registered by me) have changed all their usernames to user1176409……
UPDATE: I think this problem has resolved. They ( I mean Stack Exchange Community Support Team) have emailed me.