I've flown into SBP a number of times - either $100 hamburger runs from Watsonville, or pit stops on my way to LA la land - and found the tower controllers there to be some of least courteous of all the fields I've flown into. Not bad, just not very friendly. Maybe they just pissed these guys off.
Could be but think about the implications. If I wanted to continue my flying career I think I'd find another way to handle my anger.