Two things.
If you can't find someone's address, you aren't using the correct search terms.
Second, pretty much every post from every forum on the net is available if you search hard enough. Most things are indexed automatically by web crawlers from Google, etc. However, there are ways to hide sections of forums from the web crawlers, if the time is taken to set them up properly.
The bottom line is this: Expect everything you type to be searchable on the internet, unless you KNOW and have CONFIRMED otherwise.
If you can't find someone's address, you aren't using the correct search terms.
Second, pretty much every post from every forum on the net is available if you search hard enough. Most things are indexed automatically by web crawlers from Google, etc. However, there are ways to hide sections of forums from the web crawlers, if the time is taken to set them up properly.
The bottom line is this: Expect everything you type to be searchable on the internet, unless you KNOW and have CONFIRMED otherwise.