- To people who catch the N35 bus
- To people who vote republican
- To people who like chocolate
So how would you find what posts to look at? You would enter your details (confidentially) to the site (e.g. address, company, interests) and using categories, the most relevant posts to you would flag up when you log in (or digest via email). e.g. if you entered a New York address, all posts that were "To: The inhabitants of New York" would flag on your account.
Of course, this site would allow anonymous posting so people would not be afraid of posting controversial questions.