BuddyPress.org

@dharmen99

Go to your WordPress backend and click “Users”. If you’re running WP-single, you’ll find it under the “Plugins” menu; if you’re running multisite, you can find the link in the “Super Admin” menu.
Check each user you want to delete, then in the “Bulk Actions” dropdown at top-left, select “Delete”.
Click “Apply”. You’re done.