how exactly is it not legal to film someone threatening you? i get that it may be illegal to film on someone's property without their permission, but if they start violence or are threatening your life you must be entitled to record the evidence.
As for farmers being unhappy with hippies on their land, i didn't think this was texas! i am on my parents' farm right now and i can assure you all the ~50 neighbouring families would not take strong issue with it, they would probably just suspiciously ask what you were up to. I do it all the time when the neighbours stroll around on our land! People around here don't seem too fazed by such things.
Personally i wish it was like sweden where you can go on anyone's property unless you camp within 100m of their house, or if they find you and ask you to leave. it makes much more sense. people should be allowed to walk about the earth, as long as they don't cause any trouble (or make infuriating lawsuits...)
finally incog your dad sounds like a cunt. i am sorry for how your life must be and have been.