I am a woman on the street. Most homeless people are male (by a very wide margin). I have had people offer me a place to stay, some of them were <i>men</i> who were clearly expecting me to earn my keep on my back. I turned them down.<p>I am mentioning that only to point out that you are guilty of the prejudice you wish to eradicate: You <i>hope</i> I would not wish to harm someone who opened their home to me. You fail to acknowledge the other half of the equation that I mentioned above: That the person offering me a place to stay might desire to take advantage of me in some way and thereby harm me.<p>Your personal prejudice is a significant obstacle to making this viable. It would bias design towards protecting the people opening their home while giving short shrift to the people needing a temporary place to stay. If you cannot overcome that bias and look very objectively at the problem space of protecting all involved parties, I recommend you abandon the idea, whether for refugees or for anyone else.