So engaging cruise to pursue a target is considered fleeing? Sounds more like chasing.
So if you are chasing a pirate and he manages to flee from you using thrusters you still win as he has fled and must leave the zone. This was already covered in the other thread. Once he is outside 6k range he is considered fleeing so just state in open system chat "Target has fled, engaging cruise to verify target has left the system". That means the battle is over and the loser is being escorted out of the system.
If a pirate thrusts away from a battle and then pirates in the same zone then it is a violation.
If he remains in the zone for more then 10 min, report him. I really can not see it taking more then 10 min for a fighter/bomber to exit a zone.
Remember that if you leave they're fine. But yeah, that's pretty much right.