Does anyone know,or have any past experiences, with Jagex banning one account for whatever reason (lets say botting) and then tracing your IP and banning your other accounts?
They do in the more serious cases. They don't care as much as you think about bots who are nonmembers, or even botters that are members and have a legit CC. They look for stolen CC's and IP's tracked back to China.
Yes, they do. Depending on who you are and what you have done. Basically if your one of those underground market people who have 2147M all the rares you can imagine and they see your doing suspicious things, they would assume your a gold farmer. But in most cases they just go by the account.
Some people say they do. but I doubt it.
If they are going to ban an account it will be the one cheating, not all the accounts that belong to that same ip address