If you have access to the database, I would either a: delete/drop the instances of the old user entirely so there is no issue for new subscribers with similar needs, OR b: go into the specific area of where the blog name sits in the database and edit the name field to “OLD_name of blog”. I’d expect that you’d really only need one character difference in the OLD filed for someone else to use the original blog name.
It might confuse Google and SEO for a bit if the old blog was active for a long time, but if you’re not concerned about that, there shouldn’t be any issues.
I’d like to add a caveat though… Before you do *anything* to your database, please back it up to your computer harddrive first, ’cause if the suggestions I give you turn out to create more errors you’ll probably need to import the untouched database to fix any issues (and its good practice to make a back up anytime you decide to work directly within your database).
Thanks a lot for your answer.
But is there any possibilty to delete old blogs at the same time of deleting a user without entering the database ? Doing it manually in the database would be so binding.
I precise that the blogs steal appear in my wordpress admin but not in buddypress. i would like them to be deleted at the same time as the user account is deleted
Have you searched the WordPress.org forums? That’s the better place, as this doesn’t seem to be related to BuddyPress.
I’ll try to search WordPress forums.
Thanks
>A user can delete his account
That’s a BP item.
You can change the settings here and have them contact the site admin to delete their account
/wp-admin/admin.php?page=bp-settings
Then you can use wp-admin/users.php to delete the user and all their blogs & posts
If you want users to be able to delete their own accounts and have all their blogs & posts deleted at the same time, you’ll have to write some custom code.
There is a hook …
`do_action( ‘bp_members_delete_account_after_submit’ );`
in /bp-default/members/single/settings/delete-account.php
You could quite easily use that hook and write a function that will delete the user’s blogs & posts.
And that way you could leave the /wp-admin/admin.php?page=bp-settings to Yes to allow users to delete their account.
Great!! Thank you very much.
But can anyone give me some trail in order to write some “custom code” in delete-account.php so that the blogs associated to a user are deleted at the same time he delete his account.
I am a very bad code writer 
That would be sooo helpful
