If the will gets challenged by all of the Hilton clan, its the charity (or charities) that will get hurt the most. Not to mention lawyers WILL keep it in the courts for as long as they can and will recieve a good chunk of the 97% of the estate for their efforts.

Its rich fighting with rich when someone 'tries' to go a good deed, and its still the people who need it the most that get screwed. Nothing changes.