I would like to discuss the "don't sign your message" rule with other StackOverflow users and -- hopefully -- persuade the appropriate people to consider modifying the FAQ and removing the rule.
I take great pride in affixing my signature to my written work, whether it is written by hand, or typed on a computer and posted on the internet. I realize that Stack Overflow automatically appends a signature block, and that it might seem redundant for me to type my name ("Aaron") at the end of a message or question. However, I feel very strongly about the importance of human beings signing their own work, rather than delegating that task to a machine. I understand that "every post you make is already signed with your standard user card, which links directly back to your user page," but it is personally important to me as a human being that I sign my own messages. I also believe there is a precedent for this type of personal signature that can be traced all the way back to the earliest days of the WELL.