The act of deliberately spreading false information or rumors on the internet to create discord, confusion, or harm is generally referred to as "trolling." In more severe cases involving targeted harassment or the spreading of more serious false claims, it may be referred to as "cyberbullying" or "disinformation campaigns."
I do not see much cyberbullying so that leaves us with two things 1. Trolls (you know who you are) and/or 2. WF has hired consulting firms to spread disinformation.