Is it possible to live in a tent in the woods? What about a tarp?

Is it possible for a homeless person to set up a tent in the woods to live, without getting caught.? The woods are within a city and public property. What if the person glues the tent with leaves and stuff so nobody can easily spot it? If not a tent, could a person just keep a sleeping bag in a tarp and live in... show more Is it possible for a homeless person to set up a tent in the woods to live, without getting caught.? The woods are within a city and public property. What if the person glues the tent with leaves and stuff so nobody can easily spot it?

If not a tent, could a person just keep a sleeping bag in a tarp and live in that?
Update: Not in Hawaii. I'm wondering because this one teenager called "The Barefoot Bandit" lived on the run for 2 years, living in the woods in Washington.

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