Another person who advocates abolishing the whole Ninpouchou system here.
However I want you to know that stopping the system and removing Ninpouchou files IS NOT enough.
The internal posting logs of DATs, which have IP addresses of the posters, also contain Ninja IDs (Ninpouchou IDs) of the posters.
So after stopping Ninpouchou, Ninja IDs contained in logs should be removed accordingly.
If I recall correctly, a Ninja ID is at the User-Agent field in logs.
Thanks in advance.