I'm not sure I understand what you're saying, but I'll try to answer your questions the best way I can.
There's no automated process. You downvote whatever post you think it's spam, plagiarism or any kind of abuse. That's your right and in a way an obligation as well. Then you can report to Hivewatchers and the community that concerns as well. Then Hivewatchers decides what to do, give warning or blacklist if it's a repeated abuse.
Communities is a different matter, every community has its own rule. Leofinance is quite crazy. Let me go look for the screenshot in my phone and post it in the continuation of this comment.
Posted Using LeoFinance Beta
Ok, that I already knew… was thinking new things were deployed.
Cheers