Robert,
The one thing I noticed was the botched read back by the UA FO. She sounded nervous before rolling. She should have been monitoring the communication between the tower and the Cessna. I have the feeling that she was along for the ride.
Botched readback? So she stumbled on the callsign? So she's a cripple?
What communication? All the tower said was, according to Max: "roger keep Highway 101 off to your left side" (which seemed to be an undesirable place to be given that a 777 was about to blast off straight into that piece of sky).
I think continued criticism of the 777 crew is unfair.
As for the Cessna pilot, he was about about to cross the extended centreline of SFO 28L. If he wasn't sitting on the edge of his seat looking at the runway watching for jets heading straight at him he'd have to have rocks in his head. But even with the almost-too late tower warning, he still came mighty close to the 777.