For those who remained neutral during the Revolution, was there any retribution (e.g. property seizure, social ostracism). I'm particularly interested in those loyalist in NY.
This previous post: http://www.reddit.com/r/AskHistorians/comments/1hht57/loyalist_emigration_from_the_newly_formed_united/
has a reply by u/magneto88 which focuses on NY loyalists. It may address some of your interest in that population.
Loyalist is generally a term reserved for those who actively took up arms against the newly formed United States. As to that category, many relocated to other parts of the British Empire.
Most 'Americans' who remained neutral, were not specifically affected, adversely or otherwise, for that status. However, in some areas, particularly frontier lands near Native American tribes allied to the British, it would have been difficult to remain neutral.
70,000 to 100,000 loyalists emigrated from the U.S. after the revolution. The largest number went to Canada (both Nova Scotia - which then included New Brunswick - and "Upper Canada" - now Ontario) other destinations were East and West Florida, the British Caribbean, Great Britain, and even as far as India.
This was probably the largest (proportional) emigration from the U.S. in history, except for the emigration of Puritans to support the Parliamentary (and Puritan) cause in the English Civil War, when an estimated 7-11% of the then 40,000 population living in the colonies which would later become the U.S. returned to England.
Of course, many more loyalists probably remained in the US than emigrated, and tried to make some accommodation with their neighbors.