My first name is hyphenated. I still run into web forms that insist that having a hyphen in your first name is "invalid" or that my first name is too long for the form. So I get mail addressed to all sorts of variations of my name not to mention people that "correct" my name by thinking that it is my last name that is hyphenated. And there's also the fact that search engines seem to ignore a hyphen so someone searching for me will get lots of results for someone whose first and last name make up my first name. That is real fun when that person is a famous kidnapper...