If I smoke pot in public a man with a gun will put me in handcuffs.

false, depends on your state

If I don't buckle my seat belt I will be fined.

also false, depends on your state. If you hit someone and they are wearing a seatbelt will you have as much liability as if they are not? It is really good for you in that situation isn't it? We don't have a primary seatbelt law here.

In some states I'm not allowed to grow food

false

share with homeless,

false

or collect rain water.

false

If I settle an uninhabited piece of land men will come and take everything and I go to jail.

LOL, you want to be able to squat on other people's property? You are lucky there are police if you are a squatter. They will probably just make you leave and only arrest you if you come back and if they arrest you then they will take you to a nice comfortable jail cell and feed you and take care of all of your needs until they let you go because trespassing is not generally too serious of a crime. How would people deal with squatters on their land if there were no police?

Anyhow if you really found an uninhabited piece of land, or any piece of land that you actually settled and were able to remain there for a long enough period of time without the real owner complaining about it or giving you permission then you can in fact legally take title to that land.