I like the method of adding a "deleted: true" flag to records that are ready to be deleted which makes them hidden in the UI, then log or email something like "

I like the method of adding a "deleted: true" flag to records that are ready to be deleted which makes them hidden in the UI, then log or email something like "INFO: 592 records to be deleted". Then, after another couple days or weeks, a really simple filter removes the "deleted" records.