Several reasons occur to me.
Sometimes they have one seriously mean dog and they don't want you getting chewed upon.
Sometimes there is illegal activity going on there. Meth labs sometimes go with areas like that.
Sometimes people who live in areas like that are called upon by "official" people who are trying to "help" them and they don't always want the help. Social workers, truant officers, child welfare workers, local government people trying to enforce building codes or eyesore laws, often have business at such homes. Often they are not welcome.
Sometimes people that live this way have annoying "friends" or even worse family.
Sometimes it's a matter of wanting to keep out the bill collectors.
Sometimes people who live in this condition have a personality disorder or mania. A fair number of homeless or impoverished people have mental disorders. This often makes them suspicious and hostile to strangers.
Sometimes it's a case of them being cranky, unfriendly people.
Sometimes they have one seriously mean dog and they don't want you getting chewed upon.
Sometimes there is illegal activity going on there. Meth labs sometimes go with areas like that.
Sometimes people who live in areas like that are called upon by "official" people who are trying to "help" them and they don't always want the help. Social workers, truant officers, child welfare workers, local government people trying to enforce building codes or eyesore laws, often have business at such homes. Often they are not welcome.
Sometimes people that live this way have annoying "friends" or even worse family.
Sometimes it's a matter of wanting to keep out the bill collectors.
Sometimes people who live in this condition have a personality disorder or mania. A fair number of homeless or impoverished people have mental disorders. This often makes them suspicious and hostile to strangers.
Sometimes it's a case of them being cranky, unfriendly people.