vCenter: There are "Unregister virtual machine" tasks/ events on the host, and I don't see the "_backup" objects anywhere else.
vCops: I see them in Environment Overview in the Custom UI, and in Resource selector widgets.
I don't see them in vSphere UI - sorry didn't specify, I seldom go into vSphere UI
I'm just concerned the DB will get over run with useless objects before long. Especially if we move forward with this backup method.