When I played at Torrey Pines one month after the US Open, the scorecard said that the championship tees were by invitation only or something like that. There were no tee box markers on the rear most tees and it certainly seemed like you have to have your name on a bag to play there.
More importantly, on several holes, they seemed so long and at different angles as to totally distort the strategic intent of the hole. I'll forget which Par 3 on the back had this feature, but we played from the whites and it was about 175 yards into the wind. There was a blue tee box that could extend it another 25-40 yards. But there was a black tee box that was 30 yards left and 10-20 yards longer than the blue tee and over a large native area for about 180 yards before going over a greenside bunker. I remember thinking it was really goofy in that any pro worth his sticks would carry it all the way to the green, but no 15 handicapper like me would have any business hitting from that tee box.
On the flipside, I played at Harding Park on Dec 26th and we played the blue (6850) tees. We played off of several tees that must have been used for the President's cup. There were a few holes with longer (40+ yards in some cases) tee boxes, but on many of the par 3's, for example, there was no more room for a longer tee.