I do not have user blogs enabled, only user names can be registered in wpmu. I’m not sure we are on the same wavelength here, one of us is confused (probably me)!
When I delete a user in wpmu admin panel it should delete them in buddypress too. It is failing.
The wmpu account is deleted, but it has no effect on buddypress. They can continue posting abuse or anything they like and I am powerless to stop them or delete them