I've seen SO many families ripped apart over the years, by bad planning, not wanting to admit lack of current ability, and greed. They far outnumber the ones where planning is done correctly, everyone knows what to expect, and those helping are content to help but not to help themselves (you know what I mean). And it doesn't take a big estate to produce the ravening wolves, either.
Guess it's a lesson to all of *us* not to believe we are immortal, to address our own planning needs (*and* publicize them so there are no surprises and no possibility of someone trying to steal and hide, much as we hate to admit the possibility) - and also to warn our clients to address this decades before it becomes an issue. Sigh.