I feel confident I understand what's involved at the db level:

 - If dropping, I'd need to create users for each sys admin, give them `SUPERUSER`, and then drop the `postgres` user.
 - If changing the name, I'd need to alter the `postgres` account.

My problem, though, is that I'm not sure what the consequences of this action would be. For example, what would it means from the point of view of the Linux `postgres` user? When I `su - postgres`, I can run `psql` and I'm able to connect to the database. I assume that capability goes away if the postgres DB user is gone.

Also, the database is started using the `postgres` linux user. Is there some issue if I remove the `postgres` user that would make it so the database wouldn't even be able to start?

From ps:

    /usr/pgsql-9.3/bin/postgres -D /var/lib/pgsql/9.3/data PG_GRANDPARENT_PID=1 USER=postgres PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin PWD=/ PGLOCALEDIR=/usr/pgsql-9.3/share/locale LANG=en_US.UTF-8 PGSYSCONFDIR=/etc/sysconfig/pgsql SHLVL=1 HOME=/var/lib/pgsql LOGNAME=postgres PGDATA=/var/lib/pgsql/9.3/data _=/usr/pgsql-9.3/bin/postgres

I'm running PosrgreSQL 9.3 on Cent OS 7.