I'm beginning to really dislike the downvote button. This seems like a perfectly reasonable comment so what purpose is served by fading it out?
IMO, it's incredibly harmful for the the cause and instead of shouting them down, they should just turn away and ignore them.
OTOH, if they were trying to use that experience to downplay the problem, it's perfectly fine to talk to them about why they're wrong, but civilly.
As for solitary confinement, no one gets assigned there directly. There would have to be a specific and documented reason, in this day and age particularly, why someone is placed there after ending up in a prison.