(Restating a previous comment of mine in a less verbose and hopefully more concise manner. 
)
The “Filing a complaint” section header at face value seems to be about how to file a complaint about anyone, but in reality only describes the process of filing complaints about the ED or other MetaBrainz employees/team members.
Adding something like “For complaints not about MetaBrainz staff, please see the “Informal reporting” section above.” would make it cover all cases and thus better (IMHO) reflect the section title.