Big women do themselves a disservice when they attempt to become the Righteous Fat (the Righteous Thin are bad enough all that running around and sweating somehow believing it means anything).
We do a disservice to society if we ignore the evidence which shows that stable families tend to be associated with better outcomes for children.
If we long to believe that the stars rise and set for us that we are the reason there is a Universe does science do us a disservice in deflating our conceits?
It is a historical error for those who were not there to just refer to August 28th as 'I Have a Dream' speech day. That is a real disservice to those who were there. It was a sad day. It was not a celebration environment.
We are constantly protecting the male ego and it's a disservice to men. If a man has any sensitivity or intelligence he wants to get the straight scoop from his girlfriend.