[He hesitates but, yes, despite the silent judgement that is certainly not radiating off of Sebastian's totally unconscious self, Porthos comes to his own conclusion that him taking them would be just as bad. If he's knocked out like this, it means he isn't going to collect more, and if someone is looking for memories they can't find, he'll at least know to point him in the right direction]
[So after checking to make sure he's breathing normally, he will indeed take off, several minutes later - intent on finding the others and making sure everyone's alright. He figures, wrongly, that Sebastian will be down for the count for the next few hours.]