Okay so I was gathering rights and laws and shit to prove that the Guys in White wouldn’t be able to take Danny, but then I remembered that rights can be temporarily lifted during a State of Emergency, so I looked it up and
Danny Phantom takes place in 2004.
The United States has been in a State of Emergency since 9/11. Technically we’re still in one now.
So despite all human rights laws saying otherwise, if the Guys in White can convince the President that Danny is a big enough threat to National Security that he needs to be placed into their custody, they would legally be allowed to do so.
So, yeah. I guess the whole “Danny’s captured and experimented on by the GiW” schitck is actually legally plausible. Sucks to be Danny.