i actually dont think it is tormenting an indoor cat by having an outdoor run, it gives them fresh air, and it also gives them a change of scenery, and more space. And for some of the cats that have to be indoor only like FIV+, it means the owners know it is a safe space where they aren't coming into contact with anything that could make them ill. But for those who want to give their indoor cat access to a run etc, make sure you then start using worm and flea treatments, and consider vaccinating - if you dont already do any of them.