It already exists. BTDigg: https://en.m.wikipedia.org/wiki/BTDigg

And sibling comments show there is a community of folks doing this.

People also do it to Tor’s DHT too for discovering hidden services: https://donncha.is/2013/05/trawling-tor-hidden-services/

You can’t really stop open source tech like this from existing by choosing to not open source your implementation. You just end up staying out of the conversation yourself. The community will still build it if there is a desire for it.

One is a repository of code that you or I can run on our own machines.

The other is a publicly accessible website that got a kit of public attention because it could easily be used by anyone including novices to pirate content.

Moderation.

TPB (and other trackers) are essentially forums.