IF someone were to say: "I am an Ariya" - Would his audience believe him? What would the benefit thereof be?
Certainly, it is no crime for a lay person who is Ariyan to divulge their status, nor is it a crime for a monastic to do so to his fellow monastics. But honestly, beyond the confines of the student-teacher relationship there is really nothing to gain. You see - When one becomes an Ariyan there is no ego tripping involved, there's no pleasure found in bragging or boasting of attainments, all that stuff is seen for what it is and long since abandoned. The Ariyan's decision making process is rooted in Dhammic cost/benefit analysis. In these dark days when there are almost no Ariyans to be found, those who declare their status e.g. Ven. Nyanavira are met with doubt and scorn. (Even when he was alive the reaction was mostly incredulous. His fellow monastics almost wholeheartedly accused him of over estimating himself or going a wee bit batty with too much solitude, and even more so after his death, despite there clearly being suttas which support the notion that an Ariya is capable of such acts).
I think there are no more than a handful of Ariyans in the world today, I know there are a few that post on a certain forum (not this one mind you) but most of them are monks so I believe they would be keen to avoid the dukkata of telling you.
"For a disciple who has conviction in the Teacher's message & lives to penetrate it, what accords with the Dhamma is this:
'The Blessed One is the Teacher, I am a disciple. He is the one who knows, not I." -