That one is really interesting. Someone at the Boston Globe went out of their way to add the 'Audience boos as' to the AP headline. Every other one I've seen more or less uses the AP feed, some use AP redirects so their stories are fed directly from the AP.
No, you can't blame Boston for it. This came from AP, as you can see from the links I've posted.
Of course, whether anyone actually edits, or posts articles without using judgment is something else again.