Collusion is criminal. When two or more HFs collude to manipulate pricing with illicit trading tactics... that's criminal. Collusion is difficult to prove... thus, they go after trackable trading tactics like spoofing and naked shorting w/FTDs.
FUDsters, including AF, are hired to provide cover for their criminal trading activities.
Have you not seen the Jim Cramer interview, where he admits to his illegal tactics and hiring mouthpieces to spread untruths? AF was Cramer's protégé.
The size of the network might surprise you... all of us.