In the last 15 years Adam Fox is the only high profile NCAA player I can think of that f***ed over the team that drafted him. I'm obviously not counting bums like Vesey.
Others are still using threats of doing it to burn the first year off their ELC, which is a shame, but other than that it's not that big of an issue.
Don't get me wrong, I hate the NCAA threat but it's nowhere near as bad for teams as having to deal with the KHL and not having a word on development nor knowing if the player will re-up there for several years after being drafted. This is a much bigger deal.