#0 - Aug. 31, 2006, 4:03 a.m.
* Parents might be more comfortable knowing their children are interacting with age-appropriate peers in a safer environment.
* Adults and minors will enjoy a play atmosphere with like-minded gamers.
* More compatible play schedules, especially among guilds.
The specific age cut-off may not necessarily be at 18, but I think you get the idea. Each country has its own interpretation of when an individual is considered an "adult".