You can use BPS BackEnd Maintenance Mode to lock your Login page / wp-admin area if you want during the BPS free uninstall and BPS Pro install if you want.
Yeah we played around with something like that called “Boomerang” many years ago. See this forum topic: http://forum.ait-pro.com/forums/topic/bps-pro-alert-a-new-security-log-entry-has-been-logged/#post-23848 for more details and why it would probably just get someone in trouble instead of getting revenge on a hacker or spammer. 😉