Those who have actually had interactions with him have provided documentation of those interactions, just like those who have actually had chats with ATT or TMoblle have provided proof of those chats.
Proof of legitimate interactions seems to be in short supply.
Here are examples of proven interactions:
I was the only one Maxine sent a personal email to, regarding this
I was the only one to provide proof the chat reps were finding information online and not on their internal systems