Sometimes I post comments on my own pages, usually in reaction to other comments. I usually use only my first name ‘Jeroen’ to post these comments, but everybody is free to use any name he/she wishes, including my first name. After all, I am not the only Jeroen in the world.
But how do you know that it was really me who posted the comment? From now on all my comments are PGP signed, so you can verify them with my public key. This way you know for sure that the poster of the message is the same guy as the one who created this site.
Of course you are free to sign your own comments as well.