Nice guy. That someone in a high-powered ship, possibly in a group, ambushes weak and lightly armed ships for entertainment doesn't necessarily mean they don't experience compassion (sociopathic). But it makes it more likely than if they don't do that. Is it really reading someone's mind to decide their favorite color is blue, if they have a blue shirt, a blue bicycle, and say "I really like the color blue." They could be pretending, but would you say it's just as likely their favorite color is red? I wouldn't put money on it.
Closer to the issue at hand, if you saw a kid in his early teens poking a cat in a cage with a stick, the cat obviously having a bad time, would it be reading his mind to assume something about his character, until you have new evidence to the contrary? I don't think so. It's not mindreading, it's comparing the actions of a lot of people over a long time and using inductive reasoning. E.g. "Most people seem to care to a degree about the emotions of others. However, everyone I've ever seen poking a cat in a cage with a stick doesn't seem to care about the emotions of anyone or anything else. Therefore, there is evidence that poking a cat in a cage with a stick implies a person doesn't experience compassion."
That I have studied people intensively for a long time is a fact, and relevant, and if I ignored that, and that I'm smart, I wouldn't be able to offer much insight, which is what I'm doing. Not to everyone (especially not gankers themselves), but maybe their victims. My degree is barely relevant, as I've always said (save for incidental exposure to the subject matter in broad classes); here's how it came up, emphasis added: