These commenters will have their google accounts banned. That happened before

https://www.reddit.com/r/videos/comments/dtr6gi/youtube_susp...

The YouTube channel can arbitrarily delete comments on their video.

At least until the system starts auto-flagging them to be hidden, yes.

there will be code or even memes, not an easy task. twitch still has problems with that, kids will always find a way around that

Definitely. I look forward to the measure / counter-measure fight.

... but this is the same company that currently owns the top-tier solution for ad spam and ad fraud; I expect them to be slightly harder to defeat than Twitch.

I see comment spam in every major youtube video I see. As long as its not a top level comment, it doesn't seem to stop any spam at all.

Whatever their spam product is they're either not using it in youtube, or it doesn't work.

But in order to see that you would have to read YouTube comments, and nobody should be subjected to that. It is inhumane.