That's wild. You have personal anecdata seeing this in action? How do you detect it? How do you know you aren't just being... paranoid? Can you give irrefutable evidence of an simulated persona? How would one even prove that?
[1] http://wiki.project-pm.org/wiki/Persona_Management [2] https://en.wikipedia.org/wiki/Ntrepid
https://www.reddit.com/r/netsec/comments/38wl43/we_used_sock...
tldr: it's extremely difficult to detect and mitigate, relatively easy to do (assuming you have some technical skills), and quite effective
Try googling "Koch brothers astroturfing" I remember some news about their climate change astroturfing recently.
Maybe also "Tony Abbott fake twitter likes". The Australian PM was paying for twitter likes.