Feb 10 morning train

In 12 years of living in NYC, to my recollection limited as it may be, i have not seen a bum on a train or on the street or sidewalk, or anywhere with bugs visibly crawling on them. Last night was the first time for such a sighting. This morning was 'maggot train part 2'. Another vagrant rider with his energy removed from his chassis similar to the guy last night--just enough fuel in him to nonchalantly brush the 'sourdough crumbs' off his lap. i don't want to come off sounding faint of dirt, but what's going on in this town?