Seems like I misunderstood what tags are for. They're not individual
flags for the play, they're commonly used for excluding/including tasks
at runtime (e.g., `ansible-playbook $PLAYBOOK --tags $TAGS`). When
running a playbook, it will execute all tasks by default.
Think of them as attaching a label and letting the user choose from the
playbook run. Setting multiple tags at the playbook-level seems to be
the best practice as seen from jwflory's Ansible playbooks.
