Well it's all hypothetical at this point because without your code, we've been mailing to households! For individual contacts I've relied on the fact at members with a recorded date of death are also marked as deceased and excluded from any mailing labels or email blasts.

I'm postulating using head of household as a way of selecting on recipient per household. If you have records for John Johnson, Jane Johnson and their household, without your code, we've named the household record using the joint greeting as a name, "Mr. & Mrs. John Johnson" and used household when we wanted to send to both persons.

Using your code, one could use the individual contacts, but could use a relationship, group or tag to limit the selected contacts and avoid generating two mailing labels to "Mr. & Mrs. John Johnson", one from John's record and one from Jane's.