The problem with the standard is that many people are refered to with all three names. For example Lee Harvey Oswald, or Pamela Colman Smith.

Of course, this usually only applies to people who are dead or assassins. When was the last time you heard Lee Harvey Oswald refered to as Lee H. Oswald? I daresay never, and even if you did at one point, that point more than likely being when you just read it several seconds ago (smarty pants), it is rare.

Clearly this is the exception to the rule.