I studied this in a linguistics college class. Genie wasn't an experiment. She was kept locked up by her family for reasons that are still unclear (he father committed suicide after she was found) and was only freed at age 13. Her situation was unique, to say the least, and she became an ob<x>ject of study by linguistics experts at several universities. They were interested to see how much she could learn at such a late age - we learn to speak very early - the question was: would she be able to learn at 13? These researchers grew to genuinely care about here - but they were criticized because for their scientific interest.
No, the law says that its a crime to deny a child the essentials of life, people have thier children taken off them for that
No, it could no longer be justified ethically.