Columbia University is the largest territory in NYC, and the Columbia University Tenants Union is fighting to keep it in check.  By Jeremiah Barron Illustration by Nini Vilac In 1987, journalists Ted Robbins and Jack Newfield published  a ranking of the city’s most abusive landlords in The Village Voice ; Columbia University won the title of the single worst landlord in the entire city. The largest private property owner in the city was, in their words, “a wolf in sheepskin c