Every week or so on local FB page: "Anyone recognise this cat? Keeps coming in our garden. Looks lost. Clearly starving, eats everything we put down for it. Need to get it home poor thing." With photo of sleek/pudgy-looking cat.
Then there'll be a load of comments going "can you get him in a carrier???" "poor lamb it's so cold out there today :(" "get a paper collar on it!" "oooh what a gorgeous cat, I'll have it if you can't find an owner" and the local cat rescue crew tagging each other in to get someone down there with a microchip scanner right this instant. And then eventually someone turns up to say "that's my Bertie, I live two doors down from you, he's perfectly fine please stop feeding him" EVERY TIME.
It's a CAT. Just because it's in your garden doesn't mean it's lost and homeless! And just because it eats whatever you give it doesn't mean it's starving!