Take a look here about Dignity Village in Portland, Oregon --
Apparently the "homeless" are politically active, too...
Oh my Lord those links are over the top. The out of the doorways one says :
Dignity is a formerly mobile tent city in Portland, Oregon, well on its way to becoming a green, sustainable, urban village.
and also that the tent city of vagabonds has begun hosting weekly craft lessons in conjunction with the local high schools ?
Flea publik eudkashion !!!!!
Sometimes, squatters get lucky and find a squat which the landlord seems to have really abandoned. Police and neighbors have been dealt with successfully and after many months the landlord still hasn't complained or been seen. In that case, squatters might start laying plans for gaining adverse possession.
I hope they are taxed like the rest of us, especially for their housing/land.