In RuneScape why did they remove gnomecopters

Because Jagex had some problems with it:

1. People tried to trade with the member people which resulted in slowing and glitching your game

2. A glitch with the Castle Wars area was found when the round ended some people found themselves in the Lobby(but they couldn't move, if they did they would find themselves back in the gnomecopter place)

3. Hackers were able to get past the restrictions, and actually were temporarilly mem until they logged out.

4. glitching didn't allow people on mem worlds to do Gnomecopter