Mrabinowitz is Mark Rabinowitz (born July 14, 1972), a data analyst living in Royal Oak, Michigan.
Rabinowitz is a 1990 graduate of Harrison High School in Farmington Hills, Michigan. He graduated from The University of Michigan in 1995 with a Bachelor of Sciences degree in Mathematics.
He has done very little work editing WikiPedia. His first edit occurred on December 21, 2006, when he noted that the Scandinavian (or Center Counter) Defense was used in the 2001 film of Harry Potter and the Philosopher's Stone. In September 2007, he wrote and posted an article on The Wilton North Report, a long-forgotten late night show that lasted all of four weeks on the Fox Broadcasting Network in 1987.