I encountered this recently on Facebook Marketplace. I post ads for houses for rent, and the ads say "no pets". This has been fine for 20+ years on craigslist

I encountered this recently on Facebook Marketplace. I post ads for houses for rent, and the ads say "no pets". This has been fine for 20+ years on craigslist, but on facebook marketplace the minute some guy writes that he "has a service animal" and you don't respond the right way, your ad gets blocked/banned.... You basically have to accept these people even though the law allows you to prohibit animals, service animals must be accepted otherwise you violate the ADA. I knew this guy when I was living in Sunnyvale he had a cat that was a registered service animal, and he would get kicked out of every hotel he went to, because they dont allow animals/pets, and then he would sue the owner under ADA laws and collect ~40k from each hotel owner. Its a real racket.