I just have to rant at someone, I'm so furious and I can't even be bothered to change my name for this. My mother has just called me crying because my brother (who is 30 and lives with her - loooooooser) is ranting around the house scaring her.
I have had this conversation with her a million times, phone the police, throw him out, stop doing his laundry, stop taking responsibility for his behaviour, stop infantilising him, stop being a lousy mother by making him an unsuitable mate for any decent woman.
She doesn't listen because this learned helplessness is a repeat of behaviour patterns she learned as a child and a wife and it's what she's used to. But when she phones me up to try and get me involved, it really pisses me off. I know this sounds unsympathetic, but you can't help someone who doesn't want to be helped and who is afraid to let go of destructive behaviour patterns because that's all they know. I can't help her and it just totally frustrates me that she's interrupted my work and ruined my morning by inflicting this information on me that there's nothing I can do about. I know that sounds horrible and I'm sure a lot of people would be shocked by how unsympathetic I am, but I've heard this crap for years and I can't do anything about it. I just told her to phone the police, which I know she would never do. 
Vent vent vent vent vent.