Just how would you solve this if you were in their position?
Why not say "you cannot view this video if you are over 18" unless the watcher is specifically added to a list of allowed viewers?
Why not require the watcher to enable a webcam & mic while watching videos containing children and create an algorithm to detect wanking?
There are lots of solutions.
relevant xkcd: https://xkcd.com/2106/
Just how far are we willing to go to make our selves feel safer?! If you think that recording viewers is an acceptable and proportional solution to this issue, then your sicker than the creeps who get off videos of children.
I sincerely hope you're joking.
Additionally, by a simple analysis of what videos are overwhelmingly viewed by accounts that view other inappropriate videos they could detect and remove almost all the videos that creeps are into. The original video which blew the whistle on this even pointed out that the youtube recommendation algorithm had detected this pattern of behavior, and once the person viewed a couple of these child exploitation videos they were recommended hundreds and hundreds of others.
While banning accounts that post multiple comments with questionable timestamps may be a somewhat reasonable way to proceed, just banning people based on the pattern of viewing they exhibit will lead to an unacceptably-large percentage of false positives. Just think back how many times you're feed got filled up with videos of a certain topic because youtube misclassified you somehow. The issue is further exasperated when the same account is used by multiple people (a family computer in some living room, an adults phone used as a pacifier, and other situations in which viewing patterns get muddled).
Just permanently banning people on patterns alone is a very bad idea.
>(hard to enforce, but at least they can hold that in their pocket if one of these creeps shows up on their radar again), and then forwarding their information to law enforcement. Lots, or almost all probably, of those accounts can be linked to a real person (either by the username or their IP). If police knock on some doors a lot of these guys are going to be too stupid to lawyer up and will probably confess to much worse things or agree to hand their laptop over for inspection after a couple of questions.
The thing is, what they're doing, while sickening, is not illegal. I strongly doubt law enforcement would be interested in getting flooded with reports of non-crimes that have a high false positive rate. I also doubt people will take kindly to being misreported to the police.
I personally believe that the issue of people creeping off videos can't be addressed without causing unacceptable (and sometimes significant) collateral damage to others. I think the damage done from banning comments on videos of children will far outweigh the damage caused by those comments themselves.
People should evaluate this issue rationally and not overreact.