mm....the amt of gems we need for kyuubi is high...gems for the map for stone village is high...the gems we need buy a castle/cityhouse is high...maybe that's y ppl r doin it? >.>
but if it's just to simply get the most gems as possible for no real reason aka greed...then it's wrong >.<
there's really only 2 options...either keep the gem coffers closed or contine to let ppl take advantage of it...it's like wat neji said when there's a way, there's a will...the weaknesses for future possible solutions for this problem will be exposed and taken advantage of
i see the only way to control it is the make the punishment for this action very severe to the point that if caught would be ban...or...
u can use KB's suggestion....make it only in the stone village but also make a cost for tarvelling there (like 1 or 2 gems)...and then limit the gem coffer to like 2 gems/2x a gameday....and to make it more fun...make it like a 50% chance that they can withdraw their gems hehe
or if u want to be more evil...make it 30% chance >.>
they can always deposit but not always withdraw
also i guess adding a dk limit would help a lil...maybe 200 for fun >.>