My proposal:
When there is no possibility to distinguish between "new player on Noobia" and "new player on Gobaith" we shall make some "working-range" for us.
That means that our chars are always on one place -> their working-place, where they RP, PG...and talking to the new players 

So we dont have to walk across the whole Noobia for searching them. 
Disadvantage: it could be boring for them, who are placed on an area, where nobody want to go or where new players go really rarely. 
Advantage: The spreading ist not like: 3 Guides on the isle for learning [...], so the 3 guides  are "wrestling" for that one new player, who is there.... and the next isle is empty. 
Your opinion: ?