Power-leveling is absolutely BROKEN

[Jynx]

I wonder if you can even name one level progression MMO where you couldn't mooch xp while AFK. I mean, among MMOs that award xp, that is. Just curious.

Ultima Online would be one. Although you only ever accumulated experience through action use, a handfull of skills could be done by just idling your character near weak monsters but otherwise it was hard to cheat the system without botting.