This is a curation guide by dantheman
https://steemit.com/steem/@dantheman/how-to-maximize-curation-rewards
This one talks about the algo penalty
https://steemit.com/steem/@abit/new-curation-reward-algorithm-huge-penalty-to-early-voters
Both talk about how properly curating reduces bots and penalties, so there is kind-of built in moderation to eliminate trickery, but nothing targeting the scenario you mentioned above.
I go by these "golden rules" of curating. Just started curating (been authoring for a month) so we shall see how that all works out!