When they did that RuneScape gold they would be breaking up the multiple logging in principle, and two individuals using the same IP address can't log on to the identical world so it would be very difficult to do what you are saying. Dip trading is against the rules, and people still do it. Notice how I said distinct computers. Additionally, 1/4 of 30,000 = 7,500 * 7 = 52,500 exp per week....and that is only per high level personality...
Ok, I've thought of an idea that could make it easier for people to transport around Runescape: A horse and carriage. I mean, would not it be cool, riding a horse around RS rather than playing some crap toy horse (can be rather entertaining sometimes) I'm still in the early stages of this thought and theres more to come. So far I have just thought of the carriage, how this would work and how to receive you.
The horse and the way that it would be incorperated into the game is still in thought. Will be posted as soon as it's thought of. Carriage. Ok, the general idea of the is that it may save your items whilst you are travelling about Buy old school runescape gold. I suppose you could get two or three inventories in there or similar. This would make it easier to transport larger amounts of items.