Hi Gryphon,
If they want to keep the secret to be able to share it only in the "OPERATIONAL LIAISON MEETING FBW", at least I expect something similar to a "CAUTION: Do not select Auto Brake to Max until after Flight Control Check to avoid any unwanted brake activation."
It's not secret - I found it easily with a Google search, or try
Taxi_Procedures.pdf slide 7.
It's only a problem if you forget to disarm the ground spoilers after landing, miss all the clues, restart the engines, fail to notice the Spoilers are still in the armed position, miss the GND Spoilers on the wheel page, then select MAX Auto Brake on taxi out. I know it's sad - but there are pilots out there capable of missing all those clues - and it's happened.
The SOP is the last "belt & braces" error trap during the flight controls check - nothing more complicated.