Aggro mobs are often located in close proximity to each other -- so sure, I can outrun that bat in the cellars, but can I outrun it without running into gnats and poachers first? And if I'm in a higher ranked area, many mobs can hit hard enough to kill me before I am in the clear anyway. Besides, I really don't want to have to actually kill every miteling and djigga that chases me during leves in Nanawa; I don't think I'd have time to finish the actual leves. xD

If you want danger, I'd suggest you go to Sorrel Haven and play hide-and-seek with the Efts, or take a stroll through the Copperbell Mines. ^_~