I say that I wish that it could be arranged, that the victims of the next terrorist attacks in the U.S., could be limited to the people that fear "Big Brother" more than they fear terrorists.
Remember, the issue at hand is checking IDs of people already on the bus. That photo indicates the pointlessness thereof.
The 7/7 bombers all had IDs in their possession. Checking their IDs, but not their backpacks, would not have stopped them.
Given that the chances of getting killed in a bus bombing are far less than the chances of getting killed in a car accident or struck by lightning, I'd say the people you're referring to have their priorities straight.