To be honest, almost anything that is published on a computer/server besides your own has a chance of being seen/read by someone else....especially a web server. Take Facebook for instance, one of the newest and largest community sites out there. By default it will publish your information to the world unless you setup privacy settings. You can go down to the extent of blocking specific people or groups from seeing things, or only allow specific people or groups to see things.
Just because you don't advertise the site to anyone doesn't mean it's not available to be seen, especially with the way search engines work these, trolling over every possible link to add into their search database. Someone else can then just search your name and get lots of info about you - and your identical twin that has a better career in another country :-).
