One more thing to consider about internet privacy...
One of the keys to identity theft is your date of birth. Think about how many places ask for that info to confirm your identity and you'll see why it should be guarded.
Yes, your profile page has only the day and month, MUCH safer than sites that also require the year, however if you have used your birth year as part of your screen name and also put your birthday in your profile you've made it all easily available to anyone.