You get Vengeful now if you shoot ships, regardless of pursuit. It still caps at Hostile if you simply flee without shooting back (for those attempting pure trade start).
Vengeful is impossible to improve, with one exception: Open hostilities event. If your commissioned faction goes to war with another, and you are a good little attack dog by shooting up the new enemy ships to the point of Vengeful, when that event ends (takes about a year), relations with that faction reset to suspicious. You may still be locked out of markets for a while if you kill enough ships near the market.