Same thing they're doing now.
Will they have toilets?
What will the homeless do all day? Will they ever come out of the tiny houses?
What of the mentally ill homeless, whose mental problems may flare up at any time? Will these liberal homeowners like it when they raise hell in their backyard, break windows and doors, go to the bathroom all over their backyard???
When you're homeless, the world is your toilet.
Same thing they're doing now.
Yes, to break into your house and take what they please. You left the door unlocked. They live on the property so good luck calling it trespass.
Do they know how to use toilets? All they need to take a leak is the front door. A dump just needs a nice patch of grass. Right next to the kids' swing set would do.