Personal Information should not be regarded too lightly. I'm not saying that some stalker will show up at your door but better safe than sorry. ( I guess they can zero in on an I.P. address anyway if they want to )
1. You haven't used your real name (probably).
2. Cities and countries are big.
3. In the words of Ben Croshaw, posting is like trowing a message in a bottle into a churning sea of messages in bottles.
4. You're likely not to know anyone with a reason to stalk you. Look at the ego on you!
Besides, phone books are much more practical than breaking into web servers and looking at logs.