Mass Deleting Spambot User Accounts

Admins can *carefully* do a mass-delete of suspicious users by:
  1.  Visiting the Admin > People page (or YOURSITE/admin/people)
  2.  Select all the rows with a spambot account
  3.  In the "Operations" section, choose "Cancel user account" option click "Execute"
  4.  On the pre-confirmation page, choose "Delete the account and its content" and click "Next"
  5.  On the final confirmation page, make sure you are only deleting spambots and not real users or your admin accounts.  Then click Confirm to delete the accounts.