Yes, it does.

When was a time you helped someone, Donna? Did it Make them like you more?

I wonder who you might be.

That's basically what happened with my ex. I let them stay for two weeks while they got back on their feet and a few weeks turned into a few months and then eventually two years. They did nothing to look for a place of their own and it was always "I'll look next week." I eventually got fed up and asked them to leave and they got mad. You just can't help some people.
My password is password.

It can also backfire. Some people will take advantage of you then react aggressively when you eventually say no.