I guess an option to turn it off would be ok, but having some kind of aggro indicator is something that's been sorely missing from this game as well as FFXI. I'm sure some people consider it more exciting, but I for one get very annoyed when I run into aggro with no indication, especially in cases where other mobs of the family don't aggro and this one specific kind does.

Stuff like that seems to unfairly punish people trying to get into the game who might (logically) assume that there aren't mobs 10-20 levels higher than everything else in the zone wandering around waiting to tear them a new one for no apparent reason. I think this is counter to the stated goal to make the game easier to get into.