Never in my wildest dreams could I bring myself to treat somebody this way to whom I had given birth. I have never seen a less parent-like course of action. If my son were festering in a room and sponging off me in the fifth decade of his life I'd a) stop giving him stuff b) stop monitoring him for what he does and how he spends his time c) throw lots of noisy parties so he couldn't sleep at night d) hide kippers in his wardrobe and e) generally look forward and do nice things for myself rather than look backward and tell others what a failure he is. I absolutely would not bomb him with officious paperwork and promises of legal recourse just because he is inconvenient, disappointing and dissociated from society....our children may be all these things and worse, but if they are then they likely have nobody but us. I had my kids for life,not just for sixteen Christmases.