well i see this has taken a strange turn. i can also see that my statement was taken as a blanket response to anyone showing up at my door. you would of course has to make a person to person judgement but it would always be wrong to discount the usefulness of everyone who shows up looking for help. another important thing to consider is that most people are good people. sure a crisis can bring out the worst in people but it can also bring out the best in people. the majority of people you will encounter are genuinely just trying to get by and if you foster the good, it will come out even more. although some would be a lost cause, it doesnt mean you should assume everyone will be.