I'm sure Vulcans would hold Vulcan philosophy above Starfleet regulations any day and most nights. However, I'm also rather convinced Spock would not be above using Starfleet regulations as a blunt weapon in case the opponent became too arrogant or intrusive...
I think that would be petty of him, and it would make him seem defensive. It would've proven to T'Hesh that she was right about him. It is often better to turn the other cheek and not sink to the level of your opponents.