After the 1999 season, when it was pretty clear that Elton Brand, William Avery and Corey Maggette were likely to leave early for the NBA, a first for Duke, some fans at the post-season banquet cried out for them to stay.
Didn't work obviously.
There were also accounts at the time that Mike Krzyzewski was unhappy about the whole idea of leaving early.
That spring, he went on local radio and said that in his opinion, no one should leave unless they were assured of being a high draft pick because otherwise it was too risky.