All Yahoo Personals members have access to "We Match" as well, which merely shows which members have answered basic demographic and tick box questions that are similar to your own.
In my experience, however, I found We Match not to be very accurate.
Therefore, next to your smiling face is your real name, for anyone on Yahoo Personals to see and put two and two together.
Unfortunately, that mail is just to tell you that someone took a look at your profile, and maybe they "flirted" with a generic Icebreaker message.
Personals helps you build meaningful relationships with a large community of people like yourself.
You can make new friends and find dates through the Yahoo!
For people in larger areas, this could mean a tremendous amount of emails.
The second unique 'feature' of Yahoo Personals is the fact that the system asks for your real first name to identify yourself on the site, and not an anonymous, made-up handle.