Our neighbors let their cats roam, too, and they stalk my bird feeders and use my garden as a litterbox. It makes me
One of them (a very large one) jumped up on our concrete birdbath after a bird and knocked it over. The bowl of the birdbath cracked and won't hold water anymore.
There are also feral cats around, but they don't have a choice, poor things. We keep our cats indoors so they don't annoy someone else.