Noclip glitch

Note: Noclipping is the ability to walk through barriers such as walls. This glitch was called the Noclip Glitch because it let you do almost everything actual noclipping did.

Its Discovery
Somewhere around July of 2008 a glitch was discovered by a couple players that allowed players to go past almost any barrier in Runescape. This was done by abusing a bug in the Fishing Trawler that allowed a player to be teleported 150 spaces east/west outside of the trawler. It was used to do several major bugs such as buying a Cape of Legends from the Legends Guild without having have done the Legend's Quest or getting into areas that were normally inaccessible such as Tutorial Island, the unreleased city of Prifddinas, or even inside walls such as inside the Grand Exchange pillar.

The Patching
This bug was eventually found by a couple other players in around September of 2008. One of these players told the public how to do it. Fortunately, the bug was patched about 2 weeks prior to the bug being revealed. The original players that had found the glitch had reported the glitch to Jagex so it would be patched before anymore people could find out about it. The bug was patched on November 11th, 2008, the same day Stealing Creation was released. In the update, Jagex claimed they patched the Fishing Trawler to prevent players from unfairly getting fish and experience from the game, when in truth it was the patch that got rid of Noclip.

Aftermath
Not much was lost due to this bug. Jagex did have to patch the Legends Guild so players who did not beat the quest could not buy a cape and also patch several items that helped do the glitch. In the end, only 6-7 individuals actually did the glitch. A few players were banned, most players who did it were not affected.