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As someone who lives in a poorer neighborhood myself, I'm virtually certain the downvotes you're getting are from people who don't, but are appalled at the idea that you'd make such a cheeky comment about poor people.
It's a sad truth that lax community hygiene is a common consequence of the societal problem that is chronic poverty. The sidewalks in my neighborhood are perpetually dotted with dog shit, because none of the dog owners here bother to clean up after their dogs. Likewise, if you're outside before the street cleaners come through on Saturday morning, you'll see a ton of chicken bones and fast food containers littered about the sidewalk. Part of the reason ghettos look like shit is because of societal neglect; but the rest of it is neglect from the community itself.
People are understandably defensive of the poor, because they're on the bottom of our society and thus in many respects the least empowered to change their circumstances. However, those people do tend to forget that there are reasons even people from those impoverished communities don't like living around each other. I can't find it right now, but I read a poem back in high school about a little Black girl watching crabs try to climb out of a plastic bucket on the beach. In trying to get out of the bucket, the crabs would climb on each other, but this would ultimately just result in the crabs on top pushing the crabs below them down, which would in turn keep them from getting out. The poem uses this as a metaphor for urban ghettos, noting how people in those communities often sabotage each other in their own desperate attempts to escape their collective circumstances. This is referred to as the crab mentality and has been observed by plenty of people. It's one of the many factors that reinforce these societal structures and make them very difficult to change.
Source: I'm a social worker who deals with the chronically poor, mentally ill, and homeless on a regular basis, as well as living in a low-income neighborhood, so please don't give me shit about "judging" these folks. I'm not judging, I'm stating facts, and plenty of the people I serve would corroborate what I just wrote.