I've been giving this a lot of thought over the past couple of days. I remembered a segment on my local news about how good dumpster diving was in NYC.
Not just for the homeless to pick on, but families coming out at night and using large black garbage bags to collect good food that may have expired for the restaurant rules and regulations, but the food was perfectly good.
There are a lot of resources available in the city for the homeless especially during the winter months. A lot of homeless shelters, soup kitchens, panhandling, and dumpster diving. It could be a perfect hiding in plain sight scenario for BL to get lost in the city.
Those who are struggling in some way are all about how to survive themselves on a daily basis and don't really pay attention to what is happening to other people. He could get a cot and a hot meal every night and spend his days with a empty coffee cup looking for handouts, or riding the subways to stay warm. There are 9 million people in a very small city and he could easily submerge himself into that world without being spotted, at least in the short term. JMO