Why do people take advantage of those who are disabled?

It's like you are not supposed to have feelings or emotions, my siblings take things from me, and if I was to yell at them or hit one of them. I'm the one who gets punished, as if I deserve to have them take my stuff and I'm not to say or do anything about it. Like to bad what are you going to do about it. Obviously I can't do anything about it without getting punished. I'm the "special one " who has no feelings no emotions. No wonder I never happy.