I just don't get what they hope to achieve.
No way they can be successful. They just make it annoying if you are running the QT client for any reason. Key is though to keep clients running. Let the IP's get banned. If you shut down the client and re-open it, it will not remember the ban.
Maybe their mission is to force you to fix the code to make these attacks not impact your coin.
When the 'developer' (that's you) tells his users to 'keep clients runnning' because 'If you shut down the client and re-open it, it will not remember the ban' then you know that the coin is doomed.
I mean, why is the ban list not stored to a file, for instance?
I wonder if you have the skills to be the lead developer of a crypto.
The ban is not stored in a file in any crypto at the moment dunce - the above is the same with bitcoin on down