There are a lot of people commenting on how they are asked to spell their name "and it's a very common name"....
I am thinking that perhaps the reason a lot of people get asked how to spell their name (even the 'not-unusual') ones, could be that people these days are accustomed to unusual spellings.

For example, is it Kristy with a CH or a K? Lynne with one N or two? There are a lot of common variations on common names.
And that is without the very unusual ones added into the mix.

Bon, I get you on the Fb thing. My pet hate is at work, when I e-mail someone and my full name is in my sig, and they reply with the wrong spelling! How hard is it to check in rely? Big grrr.