Google (and most other top of the food chain tech companies) will never do anything about content like this until an unprecedented amount of legal action and new legislation is brought against them.  They profit too much from allowing this and other illegal activities to continue on their platforms.  Sure, they'll take action every few years to make it look like they're doing something, but as you found out yourself, some of this content is decades old.  It is protected, and what isn't protected is put right back up within a few days anyways.