I dislike proposing a problem without suggesting a solution, but I am often at a loss with the cat collecting dilemma. Authorities cannot do a house-to-house search to insure that animals are properly cared for; they depend heavily on reports by the public.
I guess the only answer is, observe, care, and get involved. If you see a situation involving animals that just doesn't look "right", chances are it isn't. If you have a rescue friend and you see signs that s/he is reaching the point of no return, kindly mention your concerns to her. She may have had worries about the same issue, and may appreciate your concern, particularly if you are in a position to offer physical and/or financial help. This has been a topic of forum discussion and the consensus was that the individuals involved in rescue all wanted at least one friend who would be willing to take on that form of intervention, should it ever become necessary.
If you observe signs of problems developing with a neighbor or other individual, it may be better to leave the investigation to the proper authorities. But take the time to pick up the phone and dial. You may save the lives of innocent cats.
