This was inspired by a social media post in which someone noticed their cat living in a neighbour's house, and loads of comments agreed that it had happened to them too.
A cat doesn't move into a house unless it is being fed. If you started feeding and keeping a neighbour's dog, people wouldn't be making cheesy comments about the Dog Distribution Service; they would call you a thief, and rightly so.
So why is it ok to do this to a cat, especially when you know it has an owner and you know that it is well-looked after?