This encouraged me to research my counties local laws on feral cats, only to find out there are none, but I found this interesting article about it: https://www.news24.com/news24/southafrica/local/ud-news/cat-crisis-a-human-created-problem-20190703

Some interesting parts:

Compounding the problem is the continued sterilization of feral cats by organisations and individuals, with a “no kill policy”.

Cats are trapped, sterilized and then released back into the community. Feral cats cannot be successfully contained in kennels as they become traumatised and injure themselves in their efforts to escape.

“Continuing to put more and more feral cats back into the community after they have been sterilized is not a solution to the growing population of cats,” said Swift.

“Realistically this cannot happen. Unfortunately, one must face the reality and choices need to be made. It is in the best interest of the animals that they need to be controlled and unfortunately this means that there are incidents where cats need to be euthanized.

“This might sound as if we do not care, but it is because we care, that these decisions need to be taken. The impact of hundreds of feral cats on the balance of the ecology and environment also needs to be considered. Food resources for natural predators such as owls and raptors are greatly reduced and this threatens their existence,” said Swift.

And before I'm called a cat killer for quoting an expert's opinion (I not even sure if I agree with it tbh).

Residents should also be cautious and not assume that a roaming cat is a feral or stray cat. It might be a domestic cat belonging to someone in the neighbourhood.