I've already mentioned that from the very beginning, because this is blatantly true.
I was astonished by the way 1S was obviously turning into a per country network and then all around a country related CS.
Just thinking a little bit of the consequences one should realize that if you want strong anonymity you should do exactly the contrary.
The very first people to screw with your anonymity are at your ISP, because they are the first to know what you're doing and also keep sensitive personal data for legal reasons. So the CS and friends should be out of your close area reach, aka ISP.
The second level of loose protection would be the juridiction. There are multiple level of juridictions. For instance in Europe, there are very strong and abusive juridictions in many european countries, and at some point now, all over the European Union through legal cooperation.
In the US or Canada things are just a bit different. There is a US and Canada juridiction, but you can profit from the local state juridictions, or all the contrary.
My point is one should avoid close friends in 1S. Your friends must be as far away as possible and as different as possible from each other, provided they are well connected with decent bandwidth.
This could be implemented in 1S as some automatic friend acquisition IQ.
For instance, related to a geo-IP localization database, that exist for free, you could filter out all the new friends based on some conditions, like those that would be closer than 1000 miles or those from your country and the countries with common borders to yours, and further, never connect from your list of friends to more than one or 2 friends from the same country at the same time, and roll over the list, so you never get the same friends the next connection or every 8 hours etc etc etc.
This kind of use would be so nasty that 1S would be hardened to a level that would guarantee anonymity for a long and extended time as long as the encryption is still resisting.