I disagree.
I follow Rekieta very closely, and know him somewhat well (as much as you can from online only contact), and the thought of the 9 year old on coke never crossed my mind.
Hell, you can even say I'm a Nick alog. And despite that, it still never crossed my mind. I don't even like participating in the child abuse speculation (which was thankfully spun off in its own thread).
Him doing coke? Absolutely. No surprise there. The 9 Y/O? Like, WTF?
Am I still too nice? I dunno, but I think most people were shocked at that revelation. He always seems to exceed everybody's expectations in terms of his depravity.
It didn't cross your mind, but it did cross the mind of others.
People who both liked and disliked Nick recognized that he was a father of five relatively young children. It had been clear that Nick was taking drugs and it was getting worse over time. Nick streams from his home. Nick takes drugs on his breaks. People generally know why one shouldn't have hard drugs in a house with children, including the likelihood that adults with impaired judgement make it easier for children to gain access to said drugs.
A child being exposed to drugs in the home of a drug using parent isn't unique to Nick Rekieta. Sadly, it happens often enough and some children don't survive the encounter. Heavy alcohol use and infidelity in a marriage contributing to an unstable home life are, again, predictable. These people don't need to be an Internet personality like Nick to invite this kind of Hell either.
From what I gather, you don't seem too nice. More likely you found it unthinkable because you aren't familiar with such scenarios. I hear "family of 5 young kids, mom is a pillhead and dad is a heavy drinker and hard drug user and both are swinger sexual degenerates" and I imagine open visits from sexual partners in front of the kids, filthy house, neglected kids with possible exposure to drugs/alcohol/sexual material, lots of yelling, and an eventual visit from the police. The signs were there and the arrest was confirmation for the bulk of it.
Anyone thinking that Nick could do all this and somehow not impact his children negatively would require Rekietian leaps in logic, that is to say, the mindset of an addict. Families (particularly large ones) just don't work this way, and Nick invited all of his troubles into his own home where his children reside.
The consequences were severe and horrifying, but ultimately predictable. This is because Nick's issue wasn't that Nick just couldn't handle his drug use and whoring around, but that he did it at all as a father of five, and not just because he was an Internet celebrity. It has ruined the lives of parents and children alike even without that kind of celebrity (yet another reason why it's silly for anyone to blame KF for Nick's downfall).