As they walked the halls, even the younger Slytherins avoided their group, eyes looking elsewhere and intentionally putting space between them and the Eighth Years.  Draco understood it, self preservation and the need for "proper" connections would have kept a younger Draco from his current self too.  It didn’t help that he and his friends had been used to discipline students the year before.  Longbottom and the other more bold students had the luxury to defy the Carrows.  Draco did not.