Did you even read the linked article?
https://ronaldthomaswest.com/2017/08/21/the-gentlepersons-guide-to-forum-spies/

Acknowledging that there will probably be social media operatives infiltrating this group with the intention of disruption is not paranoia.

It is simply acknowledging reality- to deny that reality is not going to help you...instead it will make you far more vulnerable to their strategies.