I have been directed to submit this feature request as the outcome of a support ticket.
http://customer.boaunited.com/message/28817#28817
One should be able to delete a source element in console and after the appropriate warning and confirmation the element and all subordinate records should be deleted.
In my case I have assigned each of my sources to about 1300 targets it is unreasonable to browse though the console hierarchy 1300 times before I can delete a source.