There is always two sides to the story though, so they have to keep neutral. I was 'reported' for my pup being in poor shape a few weeks ago, because the people across the alley found her (the two dogs had gotten out) and they thought she was being neglected because she's tiny, was covered in mud from climbing under the fence, had a hot spot on her neck and so on. I get that a lot with her because she's not the typical tall moosy golden that is overweight, so people assume she's neglected and underfed (she eats MORE than the other two combined). The people even fed her a huge amount of leftovers from their fridge, which she proceeded to puke up for the rest of the day (she was out of the yard maybe 20 minutes and I think had been fed about 10 cups of mixed stuff - at least that's about how much came up between the 6-7 times she was ill). I was polite to them but grabbed her and walked her back to the house right away which is why I'm assuming they reported me for being 'mean' to the poor dog. When I train with her I will play rough with her as a reward, so being walked a few feet by the scruff is nothing out of the norm for her nor does she shy from it (she's been known to body check me in agility).
I'm sure they will investigate and do what they can. They likely get hundreds of calls like that a day so it would be hard to get emotional with them all. It is crappy because that sort of thing happens too often too, and there really isn't a lot that they can do if the dog has the basics of water, food and shelter (even if it's rainwater, a can of dog food in the can - no bowl - and a car to live in, which is how the neighbor kept his dog)
Lana