There is an old saying that cat poo can blind you. However, the question is, was that just something your parents told you to make you stay away from them? No, it is actually true. There is little surprise in the fact that the feces of any animal is not going to be good for the health of people. However, cat poo does carry its own risks that are certainly worth noting and taking serious care to avoid.
Cats carry parasites, that is why we have to treat them. However, they can also carry Toxoplasma Gondii, a pretty serious parasite that certainly does have the possibility to make people blind. If the people who come into contact with cat poo have any issues with their immune system, it can be extremely dangerous. There are also links to school children having difficulty learning after testing positive for the parasite, and other mental health issues such as schizophrenia.
That means that yes, you certainly have to keep away from cat poo, especially that of animals that you do not know, and that are maybe feral.