Item Duplication Glitch!

if this is real runescape. then dont bother doing this.. if this is fake runescape.. it's even more pointless. reson being- the items only last for a split second. if u want to do this fast and easy. have the item u wna dupe. and a random item in your inventory. quickly drag and drop the item u wna dupe on the other random item over and over again, the faster you can do it the better. it will eventualy lagg the game for a split second makeing the game think the item is in 2 spots at the same time. thierfore it shows the picture as a duble. within a few seconds the item will revert into the random item you uesed to duplicate

this glitch/lag was found a VERRY long time ago