There is a gridwide sploder that collects IP addresses of people who play it (they have to go to a website and 'verify' before they can enter). If more than one person from your address is playing, they label you a "bot" and ban your IP address. They also will ban if you disagree with the creator of this sploder or his team for any reason. The ban is not only for the land you are on, but for every single parcel that uses this sploder or other associated products. Perhaps that is how you got banned?