If the laws of physics are flawed, then it should be pointed out and corrected. It will take some extraordinary proof to show the universe works otherwise. Obviously, I am not a frequent user of this message board, so I may have missed your previous discussions. Black holes cannot be directly photographed because, by definition, they emit no light. But there are many photographs of the accretion disks around objects that can only be described as black holes.
Gravitons are still a hypothesis of quantum mechanics.
A new facility is being created right now to address this question. Of course, these ideas represent those that do best in the peer review process and are the best available theories. Sorry if that is not what you intended. I'm looking forward to the exchange of ideas on this message board. I'll be nice, but in general I will usually try to ask for specifics and try to open things up to a civilized debate.