"Jagex have a system for tracking offenders. Simply changing IP or changing account, won't get you off the hook. If you are in the wrong place at the wrong time, botting in an area J-Mods are investigating (especially if you are in botting long hours), Jagex can get trigger happy with known cheaters. The longer ago your offense was, the less likely it can be successfully tracked.
You can wipe your macro offense history clean with the following steps:
(1) Retire/sell ALL your current RuneScape accounts - even those with no offenses. (Harsh, but essential if you want a fresh start)
(2) Change IP address.
(3) Create a new account on your clean IP address. It won't take long to build an account you love with RID, if you prefer to buy rather than start again, be aware someone else's offense history will then be connected to your fresh IP.
(4) DO NOT buy membership with the same card as you did any old accounts, (unless via PayPal, which sheilds card details from Jagex). (5) Lastly: never again login to ANY old account on your new IP, even to the appeal centre. If you do, Jagex will be able to link the old offense to your fresh IP and account."
Quoted from Guideline #4 of RiD's Guidelines to Responsible Use