I disagree with Skickpit attacking you, even if you "Murder Hobo" someone. Because he's a slave, he's not just property he's their punching bag. It would make more sense for him to, at the very least run and hide instead of helping the people he was going to poison anyway. It doesn't make sense he would fear punishment from them if this random person who just walked up and attacked his Slave Masters who he hated, talked trash to and was planning on poisoning. If he feared punishment for not helping, should they win, that he's just a coward so he ran.
It seems like it's more of how the AI works. If you "Murder Hobo", then everything just goes hostile. I can see that being the case in a place like the Grove. But not the Grimforge.