Im sorry but u got the sixfeetunder story incorrect
They did it with the trade menu, he told his bot to offer (item id, Amount) in trade. and he stumpled on this by accident BTW. He was tryin to trade bunny ears and sythe, He found out in the trade window if u put 0 of the amount it actully created the item, NO items were duplicated. They were createing Items. Sixfeetunder told 3 friends, I r sorrow , kaitnieks and someone else(not sure at the time) and then they told other ppl ( I was one of those other people) so we had fun and then jagex heard about what was happening. They ask for anyone with info on it to come up. they got 1,000 of messages that day. Then they offerd Unlimited Membership. I r Sorrow told jagex how the trick was done, He was banned and the trade ended, anyone connected to I r sorrow was banned (I was one of those persons) but what ppl dont know about the story is Sixfeetunder had a mule and so did I. his mule was Imma get you and mine was The Dogg99, we had around 100 hats on each accout and we each kept 1 Christmas Cracker. over the next 3 years me and him decided to turn our mules into mages and become rich. Well sixfeetunder decided to make a magebot and we tryed to get rich , but he got banned for autoing. he lost it all and left classic. Now me on the other hand. i lost all my hats. but i still play