Should we remove ability to turn on user and bug deletion?

[Albert Ting]

> Deleting users is, IMHO, a Bad Thing.  We have users in our bugzilla
> database who were "former users" long before we converted everything
> over to bugzilla.  The system records who logged that error and we
> want to keep that history.  For users who left after implementing
> bugzilla, we want to keep all their comments, attachments, etc.

I have had to use the "delete users" feature quite a bit this past month.
Or rather, I'd would love to see a "merge user" feature, combined with
maybe an "user alias" feature.

My company got merged and they're busily migration all the old email
addresses to the new format.  So I currently have 3 email addresses, all
funneled into a single account.  

A lot of the employees got confused and ended up creating 3 bugzilla
accounts.  I had to disable new account creation, merge the 3 accounts into
a single userid, and update all the sql tables accordingly.

And since the 3 email addresses will be around for a while, I plan to
create a lookup table to find the one email address bugzilla recognizes.
This will be required to get bugzilla_email_append.pl working cleanly.