Two more communities questions that I can't find elsewhere

Summary

Bug or "As Designed": Why are terminated employees remaining in communities? Also, why is there no Empl ID/Person Number in the Communities page?

Content

We are noticing that terminated employees are not removed from a community and there is no easy way to identify them for maintenance.  We are using communities for our Emergency Management Response teams (i.e., this is how electric utilities respond to storms), so it is important information remain current. Since you can't add a terminated employee to a community on purpose, it seems logical to me that they should automatically be removed from a community upon termination.