If you ask me, both of them sound crazy and deluded. Marcus' story doesn't make much sense if you read the email on that site[1], but carrying on about serial killers doesn't help your case much either. And that freelancer link is just a red herring - I can't see what it's got to do with the case at hand.

[1] Update: Or even if you read his own post: "I listened in the background and I closed the breach if indeed there was one while my wife was on the phone". Er, was there a breach or not? And why are you calling his mother and not the police?

Chris Russo is there commenting, and it calls your ability to judge character into question. For starters, he has never denied the story about Russians holding his computer hostage and threatening to kill him. He just ignored it. Then he goes for the "race" card and says PoF are suspicious of his intent just because he is in Argentina.

There is more than meets the eye here imo.