Sorry for using English ,I live in China and I don't know any about Russian.
Let's go straight to the theme:
There are many Chinese PCDN provider,The use thire computer as a PCDN node and earn mony, But it's not allow buy chinese ISP (anyways I don't know why).
The ISP will ban the user which upload much more than download, so these PCDN provider just download any resource they can find , and unlimited loop download but do not upload anything ( because they need their upload to earn money ).
Their special P2P software will report fake download completion to other Peer to deceive others to continue uploading.
rutracker is a worldwide forum so of course there is some chinese ( such as me ) and some scum PCDN provider .
How to solve it:
clearly just ban all of China IPV4 range,don't worry about ban the common user, this is why:
1. The PCDN provider need NAT1 or Public IPV4 address make they can earn upload (money) as fast as they can , so they all have a public IPV4 or NAT1 .
2. The common P2P user in china don't have public IPV4 or NAT1 (Multi -layer NAT), These users were unconnectable , but they have IPV6 ( if you really wanna download p2p in china , ipv6 is necessary ).
You can download block list free here:
https://www.iblocklist.com/
No need buy subscribe because you need only IPV4 blocklist.
And the forum’s tracker should be associated with users. I believe it should be able to identify these abnormal clients and block them.
This matter should receive sufficient attention because it is indeed consuming significant resources from everyone without providing any value to anyone.