Last year, when the second part of the High Line opened, I wondered how long the sex-positive Folsom Street East festival would survive on West 28th, now that the once-desolate block has become a destination for tourists and condo-buyers. Soon after, I looked at the arrival of massive condo-box Avalon West Chelsea, coming to the same block, right across the street from the Eagle gay leather bar, and predicted that the Eagle would not last much longer , either. As we come up on the 16th annual Folsom East fair this weekend , we hear from an anonymous resident of 540 West 28th (the +ART building ) that those dire predictions may already be coming true. Folsom East and the Eagle, he tells us, are not long for this rapidly changing world . 2011: High Line tourists pointing at Folsom-goers Construction began on the +ART building in 2008, when there was nothing on that block except for a gay bar, a strip club, a scrap yard, a truck yard, and some autobody shops . Our anonymous interv...