My educated guess is that things like @steemcleaners will have plenty of RC to continue operating normally - especially them based on the amount of SP in the account and the large delegation.
In my opinion - leaving an automated comment on someone's post letting people know that the article posted may (or may not) be plagiarized is not a terrible idea, as long as not more than one service is doing such a thing.
It may already do this, but if it doesn't it should probably scan the post for words like "This is not my work" or "I'm sharing this" or something, because sometimes it's totally appropriate to share others content - it is nice to know if the author is really the author though or if they wanted to just share something as people often do on social networks.
The blockchain does let the community decide what they'd like to see, or at least what they would like to make less visible through the use of downvotes. This is the built in blockchain mechanism to allow the community to decide what gets seen or not seen.
Either way, I believe spammy/scammy bots will be a lot less common around here.