Hm, I don't think that's true. While solitary confinement is sometimes used (wrongly) for "protection" for a suicide risk, even with that aside, as you said, it doesn't make sense to make this indefinite. And Manning has been punished for previously having a partial tube of toothpaste as well as "the wrong books" and etc. So I get what you're saying, yes this is often a procedure incorrectly used, I think it's important to make clear this isn't at all for the "protection" of Manning.