"Imprimis, we don't know who these hobgoblins are or who they work for. Secundus, depending on that and on the laws of this city, slaying them could get us convicted of murder should we let them die. Tertius, if we do let them die, we'll have no one to question as to what they are doing down here. Quartus, merely stabilizing their wounds runs no risk, as they will still be in no condition to harm us nor escape us."