My mom took away my computer away as a legal adult
She took away my computer, despite having two months left till I turn 19. I tried to fight to get it back by telling her "I'm an adult and it's my property."
She refused and said that as long as I'm in her house, her punishments apply. We may move out in a year, but I genuinely think it will be significantly longer.
She paid for the laptop when I was 16 though.