He was particularly active in the ASB forum. According to him, he lives in Haifa, and is left-wing.
His brother is board member Clint.
Yonatan was unfortunately banned on the 30th of July 2014 for "thinly-veiled support for mass murder". He had merely voiced conditional support for the then-current IDF offensive into Gaza, despite the fact that the operation was already under criticism due to accusations of repeated breaches of proper military conduct by both sides.