Should cats wear collars?

[PristineCondition]

So we moved a while back and one of the new neighbours a few doors down is a lovely lady but a cat feeder, she calls any cats over and constantly feeds them then takes them in, shes famous for it
I preempted this by taking my kitties over to meet her before they started going out and made up a vague problem that requires special food only, she was vv sympathetic and promised never to feed them if she remembers look like.
Ened up at pets at home today and saw collars that say not feed so got a few and stuck them on the cats.
Its worked she saw my two, read the collar and tshked them out her garden,good times!!

Dp has come back and is horrified , apparently you can't put them on cats anymore and I'm the worst person since

Are they really bad? They are fitted properly and easy release.

@Wolfiefan he was also microchipped but not everyone would scoop up a dead cat to take to the vets so a distraught owner could be informed. I’m just glad someone was kind enough to call.

My cat goes around naked.

@Bringbackthestripes. Our poor neighbours saw it happen. They called the vets who came out.
Round here even deceased pets are scanned.

People without animals often don't know about microchipping, so if they found a cat wandering far from home, or a dead one by the side of the road, they might think it was a stray.

I've always had quick release collars on our cats with our address and mobile number. We've had calls a few times when they have wandered far from home.

I don't have one on my boy as the lady I rehomed him from asked me not to as she had had a sad experience with a previous cat and a tree :( He is chipped though and I mentioned collars to my vet who advised against it too x