Scout Willis' Topless Protest in NYC -- Scout Frees Her Nipples (and More)

Scout Willis walked around New York City completely topless ... not for fun or comfort, but to protest Instagram's policy when it comes to female nudity.

Using the popular hashtag #FreeTheNipple, Willis posted photos and a series of tweets on Tuesday to voice her outrage over Instagram's rules about female nudity. She captioned the photos "Legal in NYC but not on @instagram."

Scout also posted a photo of a barely covered (and rather buxom) woman from Dan Bilzerian's infamous Instagram and said ... "@instagram pictures of breast cancer survivors have been flagged+deleted but this is super #sick and #hot amiright???"