Firstly, JW parents are taught by the WT that the "brotherhood" is to be trusted over and above anyone else.
Not with their kids. Imagine that! Who in their right mind would trust their 10 year old girl or 8 year old boy with a grown man? --and then blame the watchtower using your excuse. Also, except for obedience to FDS in meeting attendance and FS, I never heard that JW should go around trusting their kids with other members.
- "look out for the children of single parents or the child who has an unbelieving parent", encouraging 'brothers' to spend time with children from these "disadvantaged" families.
Never heard that. And any special attention always involve parental supervision. I am not saying though that elders have no obligation to protect and watch but such obligation is religious not stauatory. Ultimately, the parents should protect their kids and when parents fail to do that, the kids suffer; and then the kids sue watchtower.