Fucking up Matt's hand in Saints Row 2.
Burying Shogo alive? yeah, that's harsh, but he was another gangster, he chose to escalate the conflict, and he was a prize dick.
Executing Julius? Dude blew you up. He needed a bullet between the eyes.
Matt was just someone who knew Maero, he wasn't in on anything, he was the closest thing to an innocent bystander the storylines had.
(Never mind all those randoms you run over because it's too much effort to turn an they don't get out of the way fast enough, they don't have names so they're not important)