That's a cop-out. I understand he doesn't want to make headlines, but he was put the question as the number 1 player in the world. He had a big opportunity to have an impact here and he took the easy way out.
I don't think so. Even though he's #1 at the moment, don't think he can exert much of an influence, don't think even someone like Federer could change things single-handedly, and could probably just damage himself and/or make the tournament look bad. Remember that place wasn't some anti-drug panel, it was just a regular post-match interview, and they almost ignored the match.