So do you intend it to only blacklist (Ban) them from the community that's using the bot then?

It's up to the community if they want to collaborate with other communities when it comes to their list making.

Surely they're going to know when nobody interacts with them? Is there an appeals process?

It's up to the community to handle these too. Again, instead of a funded antiabuse project, the tool enables more communities to do their decentralized antiabuse initiative. A dev from a community can piece up their own bot from the info here and start their own gimmick.

The major difference here is how information is now more accessible as there is a paper trail displayed why the user has been blacklisted to mods and people inquiring readily. Some organization to which members that can call upon the bot on discord readily whenever an inquiry is made so that problems with being understaffed is no more.

Again, it's a tool that just empowers communities to do their own antiabuse program and how they want to define their own abuse terms.