Recently a friend alerted me that an Advaita teacher he knows, Cesar Teruel, 'renounced' his enlightenment, making a 'Confession' at his facebook page https://www.facebook.com/teruelcesar He is on Batgap too http://batgap.com/cesar-teruel/
The confession is only recent. To me it seems that the guy has strong enlightenment experiences, and actually uncovers deeper layers of conditioning. It has nothing to do with forcefully de-enlightening oneself. To me this guy seems to be very honest and straightforward, so his 'confession' is rather a plus than a minus..