Sounds like those poor cats need help before someone starts taking matters into their own hands ( I shudder at the thought). Maybe Furrever Animals could try educating the tenants about having a feral cat colony in their area; there are benefits. Some people are so incredibly ignorant about cats!! Esp. to the benefits of rodent control, snake abatement, etc. When I've had a problem with stray cats pottying in my flower beds, I just set out a large plastic sandbox filled with unscented JonnyCat & they almost always use that instead. It sounds like some of the tenants do want to help.