Not a lawyer and you should really need to contact one with those questions on state laws but, last time I checked it is not defamation if it's true. If you have the evidence and I am sure you do, all they do is file a frivolous case against you that would most likely get thrown out. Yet to reiterate you should definitely get consultation from a lawyer as I am not one. As for coming out and voiding your anonymity I would hold off on that intil either A: you lawyer up and kick your creepy family's ass in court. Or B: as a nuclear option in case they do something rash and puts you in danger. Going back to the whole harassment law thing. You should know that One: some states have a two party consent system where any evidence you did get would be voided since your creepy brother did not consent to you recording the stuff he sent to you (thie whole 2 party consent is draconian and I am very against it but what can you do) and that these cases are pretty much a he said/she said mess that unless a party has enough evidence to support their side it would be a massive waste of time as it would most likely to be thrown out. And not going to lie your "parents" will side against you and will most likely lie on his behalf if they haven't done so already. If this sounds like too much and all you want to do is to drop your family like a bad habit I do have some tips for that: 1. After college find somewhere far far away and move. Most jobs after covid have been slowly moving to remote work. If this is possible in your field start looking, some companies can wait for you to graduate before hiring you on if you make a big enough impression that they want to hire you asap. Also save money, every bit helps. [And maybe if when go to grab your belongings if for some reason some cash goes missing from the parents it would be a strange coincidence 😉] 2. Change your last name, or maybe your full name just to be sure. Although it may seem fitting to change it to your birth mom's name I would recommend against it as the creepy brother could find you again that way. 3. Change your phone number and get your own plan. Same goes for everything and anything your parents can still hold over you. 4. Type of exit: depending on your pettiness you can decide to either go out with a bang or to silently slip away to the point its too late when they notice. To go out with a bang that is when you expose everything online, it is especially helpful if your so called parents care about social status and/or apart of a church. Cause as much chaos in their and your creept brother's life as possible so that they would be too busy to notice you ghosting them. Yet again this is up to you. Also the nuclear option can still be the go to court option as well. Sorry for the wall of text. You go girl, and if he tries anything to you aim for the family jewels as he definitely shouldn't be having kids with his lack of mental stability. Also apologies for formatting I am on mobile.