Hey 152,
Analogy to your conundrum.
Someone you do not know, comes into your house and starts living there or takes up residence in your yard without asking you or getting your permission. If you want said person to stay, and fight to have them stay, you have a heart. If you want said person to leave, and go through the legal process or not you are heartless. My guess is that you will find way more heartless folks than those with a heart.
There are laws, or should be, regarding squatting in a house or property that does not belong to you. There are laws, or should be (and actually are on the books), regarding entering the country illegally and staying in that country you do not belong to.
mspart