Or would you rather live in a "society" that wasn't a society at all because people didn't give a damn about anyone else's rights?
Apparently to many people there isn't. You ask why society should give a damn about criminal's rights. Other people, like the person I replied to, said that criminals should have any rights at all. If someone has no rights (or nobody gives a damn about their rights, which effectively means they have no rights), then it's absolutely fine to imprison them for years, rape them, torture them and kill them. That's what "no rights" means - no rights, so anyone can do anything to them with definitely no legal repercussions and probably no social repercussions. If you don't give a damn about someone's rights, you won't care if they're chained up in a cellar for years being raped and tortured by their owner. Who would be their owner, of course. If they have no rights, they can be owned. Legally. So there's slavery relegalised too. Which would lead to slave labour because there would be plenty of people who would keep slaves if it was legal and socially acceptable but who wouldn't want to rape, torture or kill their slaves. History proves that all too well.
But there are many people, like the person I replied to, who would go much further than even that. Back in the days when England had outlawry as part of the legal system, it was a severe sentence that could only be given out by a judge after a trial or after a person had escaped, had had several opportunties to stand trial and chose not to do so. Many people today (like the person I replied to, but they're far from the only person, not even in this thread) advocate for everyone to have the power to make a declaration of outlawry and to do so without any kind of trial or investigation at all!