Delete joomla records on node / term / user delete

I am about to do a fair amount of importing (35+ Joomla sites to one Drupal site). And I want to run some import tests. When done, I would (naturally) delete the nodes/users/terms created and then start over.

A generic question comes out of this:

Should we be updating the three {joomla} tables on node/user/term delete? This is an easy patch.

If so, how would we now to clear records from {joomla_section)?