Compared with other social media platforms, like DECENT, STEEMIT, LBRY, SYNERO.. Out trump card is the big-data/data-mining based algorithm to filter trash contents or copied contents. Plus, a diverse and decentralized moderators team will help to monitor such things.
The essence of PoF is that any content that brings flow(except for illegal ones) to our platform can be rewarded, even bots. If the content that provided by a bot is more attractive and brings more clicks/votes, then this bot will be rewarded more, compared to a human.
So what is to prevent someone from creating a trojan that creates a bunch of zombies that create "flow" to their selected posts? I wouldn't want someone to get heavily rewarding from implementing something just a step below a DDOS attack.
Yes,its a problem,so in the kickstart phase,only the ICO holders can participate in the voting,Other participants can get the "words" as a reward,and then participate in voting.