I feel like there's some assumed knowledge there. Who is saying this? The family? You could believe them, and they could be telling the truth, and you could help them. They get on their feet and on their way and everyone is better.

They could be lying and slit you and your family's throats while you're asleep and take everything and run.

They could be telling the truth, but the cartel kills you for harboring them.

The chances of the first option are much lower than the other two.

I no longer give money to anyone on the street who asks, because previous volunteer work with social workers, and my own interaction with the homeless, leads me to believe the vast majority of them are scammers and shitty. I'm not going out of my way to determine which ones are "the good ones." That's what church outreaches are for. People who really need help will find it with people who deal with their type daily. Those organizations also have the experience to discern who isn't going to put in the work and just go back to their meth addiction.