I completely agree with you, I have a digital piano with headphones, and I use it in the mornings when she's asleep.
I don't like playing there, but its the only solution in the morning. In the afternoon, I play from 6 to 7:30 or 8. I think she should understand that playing the piano is a part of my life. When I see her, I try to speak to them, but she starts shouting at me, although I'm very tall and stronger than most men (I'm only 17 years old) and I could end the conversation easily, I don't and I let her shout all she wants (she's like 50 years old). All my other neighbors like it when I play...
Maybe I should blow her brains out and get a piano in my prison

, like someone said above
No, I don't think that's a solution. I think I will isolate the room.
Michael