He tried to avoid the press traveling with him and told them to leave him alone and get back on the bus. What do you think they would have said if McCain had said that? Obama doesn’t have to worry about provoking them, the press are Obama’s poodles:

“All right guys, that’s enough,” said Obama, wearing a casual outfit and sunglasses in the early evening.
He and his daughter were walking right toward the media on a public street.

“You got a shot,” he told the photographers. “Leave us alone. Come on, guys.”

I can understand that he didn’t want his daughter’s Halloween ruined by the press but he put himself in this situation and he has to learn to put up with them.
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