I have an idea of an anonymous antisocial network. In which there is no data, so even ardent opponents of social networks can register in it :).
Everything is very very simple: during registration (which does not even require an email, only a password) a unique number / key is issued. Everyone has only a bunch of key and password to the key. Next, you tell your key to your friends, they add it to their first lap. And vice versa.
Nowhere is there any data, the keys can only be seen on this site, it is strictly not recommended to publish your key so that it can be associated with the owner :). It shows only the statistics, the number and the keys of any who in what circles.
')
Since there is no data, you can issue a table of circles, to the notorious 6th circle.
Purpose: if all the Internet users register, it will be clearly seen that the number in the 6th circle is the same for everyone, i.e. the number of all registered (not counting the forgotten keys, randomly registered keys, they must be deleted. Ie those keys that have only
closed circles can be safely killed :)
upd: the answer to almost all comments :) - no communication is implied inside. He created the key, added friends, informed his friends and that's it!
Register just to see that everyone in the 6th circle has everything =).