Your posts are borderline flaming.
This is a support forum and regardless as to how you feel, your question has been answered.
There is no device level IP blocking, more configurations for FTP will be added in the near future, and you have the option to forward a port different than port 21 to keep people from scanning the common port openings by using port forwarding through your router and changing the port in the interface of the device.
Please keep your posts constructive.