Well, Hangar 9, who ever you are, you are clearly not a pilot or a CSM by what you have said. So, I suggest you go and have another read of the Qantas books before you exceed your authority again:
from the Flight Admin Manual:
18.4 Passenger Boarding.
The CSM (or deputy) shall not accept passengers for boading until it has been confirmed with the Pilot-In-Command (or deputy) that embarkation of passengers may proceed.
If, at the proposed boarding time, the Pilot-In-Command (or deputy) is unavailable and in the absence of any contrary information the CSM (or deputy) may approve boarding.
For domestic operations, in order to maintain the abilty to establish immediate communication with Cabin Crew should any need arise, passenger boarding shall not commence until at least one Flight Crew member is present. That Flight Crew member must be aware that boarding is taking place and may be either on the flight deck or conducting the walk-around.
(.....plus a bit of extra, not-relevant stuff....)
If you are not a Captain, F/O, S/O, CSM or CSS, you don't have that authority. Period. The CSM (deputy) may consult with you as to whether the passengers are ready to board, but they aren't getting your approval. At the end of the day, when considering duty-of-care issues, liability, etc, it is a very important distinction.
You bring this on yourself with childish comments about '"getting hot chocolate on the way from briefing". If we're late to the plane it's for a good reason, certainly not because we've stopped at the shop. Goodness me.......
Now......... back to the bloody topic!