The fact is this has been going on for a very long time and SE are well aware of that and have done nothing to stop it so it is not an "exploit". As Applepie stated "actual exploits" of spawning endless mobs and the spamming buffs to get crazy SP were dealt with by SE as soon as they were aware. They have done nothing to stop the abandoning of Leve's, why? Because it is not an exploit that's why.