Its not black and white because the rules are vague. However any manipulation via agreement is unethical and violation of the spirit of the rules.

It says it right here " Because of their nature, these types of circumstances are considered on a case-by-case basis. Users should avoid actions they believe are against the spirit and intent of the game." not only did they not avoid it they made it public.

This is the non sense that makes newer players not want to stick around.

If you truly believe that this is acceptable. Explain how this is any different that an agreement to keep one KD with the war win crown.

because if this is allowed to continue I will be making agreements to have my KD hold the WW crown next age being that this is acceptable behavior