Yeah, I’ve dealt with this situation before. People who let cats roam free like this seem to live in a world where there is precisely one socially acceptable exception to otherwise generally accepted neighborly decorum - cats. Suggesting that you don’t want their cat on your property makes you the asshole in their eyes, because they literally cannot comprehend any solution to the problem. Obviously the sky is blue, and cats are allowed to shit wherever they want. Thus spake the toxoplasmosis.