I certainly can't speak for NJ, but in many states, it is illegal to make a false report of child abuse. Maybe this is the case in NJ, but I am skeptical.
I was a contract therapist for a number of years for my state's CPS. In Michigan, they do not have to investigate every claim of child abuse. They have to investigate every credible claim of child abuse. If someone calls in with something that is BS or not actual abuse, this is not going to be investigated. CPS, for the most part, has plenty of work to do with real, actual child abuse.
I wonder if there is more to this besides a Facebook picture. I am not suggesting actual abuse, but I wonder if this guy has some one that is mad at him and has made other allegations.