VaD: David Mayo was the Snr C/S Int for many years, and prior to that, the Snr C/S Flag. He was Ron's auditor, he developed NOTS, and he was probably the most respected figure in Free/Independent Scientology to have emerged from the Church. He has come under attack by Marty and Mike, who stand to benefit as new leaders in this area, and who participated and planned the takeover of David Miscavige from David Mayo and Mary Sue Hubbard. Subsequently, he lead the largest Independent movement that has ever existed (hundreds of org/groups), and then was silenced as part of a settlement between Dr. Frank Gerbode and the Church of Scientology in 1994. His last known participation online was in 1995, I believe, on alt.religion.scientology, and it was a farewell notice.
His re-emergence at this time would be catastrophic for Mike and Marty, and for David Miscavige, and would probably unite the Independents in a way that has never happened since his time at the AAC's, and would probably be larger than that, if he wanted it to be. If he has ceased being a Scientologist, that would be a giant shock to many people's "stable data", and would be worthy of note in its own right.
While I would welcome him back to the discussions, it is an extraordinary claim to say you are him, and as such, requires extraordinary evidence.
Does that explain why people would be suspicious?