[gremlin]

Your brother sounds like a child. It sounds like he is going nowhere with his life and despite you and your parents trying to make him a better person, he refuses and remains the same. I assume that he's stubborn, right? It really pissed me off when I read that he guilt-trips you when you try to talk to him rationally. The next time he tries to guilt-trip you, don't eat his crap. Bring up how much you and your parents have been supporting him despite him taking advantage of all three of you. He's the one in the wrong, not you. You constantly provide him with all that he needs, yet he doesn't give you anything in return. Wait, he does. But something that you don't want. His fucking friends. Who are also taking advantage of you three and probably him as well.

If your brother's friends are continuing to sneak in when they have been kicked out more than once, your parents shouldn't even wait for a second time to come around. They should call the cops when they wake up and find a little stowaway in their home. If they don't want that person there, they can't be there. They own the home, not your brother. He has no say in who may come in to their home and who may not.

I really suggest that your parents change the locks. If you want to take away a few things from your brother. He will probably whine, but stand your ground. Don't tell him that you're going to change the locks. Buy them, then when he goes out, do it. Do not give him a new key, give him a curfew and demand that he gets a job to help support the family. If he complains that you're being unfair, tell him that if he doesn't like it then he can find someone else to live. You should probably also tell him about how unfair he has been to you three. You should also make it clear that none of his friends may stay at your home unless they plan to help, too. He's eighteen and is an adult, you can kick him out if needed. This could give him a major reality check and he may come to his senses. If not, then that isn't a big problem. He can live somewhere else.