One of the unfortunate side effects of private archives, private libraries, and
private museums is the "tightrope" that the staff must constantly walk in order
not to 'offend' the benefactors.  It is perhaps not ethical yet you either have
a job or you don't.
 
This "skirting the issue" or "putting a slant on things" is quite common in
books.  A locally "authorized" biography of our long-time local Congressional
representative quite carefully ignores the scandals and ethics investigations
that cost him his Congressional seat, but then the book and writing was funded
by the Congressman.
 
Dean DeBolt, Special Collections and West Florida Archives
University of West Florida, Pensacola