Some questioned how handing out reprints of an editorial published in the ADA’s own journal, at the ADA’s own annual conference, could be construed as a violation of that code. The scientists were not disruptive or disorderly in their conduct, based on the videos posted by MedPage Today, although the fact that they were handing out reprints just before an NIH representative was scheduled to speak might be construed as a form of protest. But it could just as easily be argued that such actions fall under valid scientific dissemination and discussion, the conference’s stated objective.
This doesn't make the ADA look good. I don't know enough about them to understand their reasoning though.