One of my cats stopped coming home and I sometimes wouldn't see him for several days at a time. When he did come home, he would eat any food that was left out and then leave again straight away. I put a tracker on him which wasn't very accurate but I could see that he was spending a lot of his time a few hundred yards down the road. So I put up posters around that area asking people not to feed him since he wasn't coming home any more. An acquaintance saw the posters and let me know that her next door neighbours were letting my cat into their house. When they saw the posters, they stopped feeding him so now he comes home every day for food and then goes back to this other house. Recently, he was injured and one of the couple came round to tell me, so I could take him to the vet. So I'm paying for food, flea treatment and vet care for a cat that doesn't live here any more. I really miss him and these people are getting all the good sides of having cat while I pay for everything. So AIBU for being annoyed at the people that have lured my cat away?